Equation Calculator with Graphing

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:shared="clr-namespace:CommonUtils;assembly=CommonUtils"
                    >

    <SolidColorBrush x:Key="Charcoal" Color="#FF655F5F" />
    <SolidColorBrush x:Key="Forecolor" Color="#FFEBEBEB" />
    <FontFamily x:Key="fontFamily">Cambria Math</FontFamily>

    <LinearGradientBrush x:Key="BlackButton" EndPoint="0.5,1" StartPoint="0.5,0">
        <GradientStop Color="#FFB9B9B9" Offset="0" />
        <GradientStop Color="#FF787878" Offset="0.04" />
        <GradientStop Color="#FF787878" Offset="0.041" />
        <GradientStop Color="#FF232323" Offset="1" />
    </LinearGradientBrush>
    <LinearGradientBrush x:Key="BlackButtonPressed" EndPoint="0.5,1" StartPoint="0.5,0">
        <GradientStop Color="#FF191919" Offset="0" />
        <GradientStop Color="#FF787878" Offset="0.04" />
        <GradientStop Color="#FF787878" Offset="0.041" />
        <GradientStop Color="#FF232323" Offset="1" />
    </LinearGradientBrush>
    <LinearGradientBrush x:Key="BrownButton" EndPoint="0.5,1" StartPoint="0.5,0">
        <GradientStop Color="#FFB9B9B9" Offset="0" />
        <GradientStop Color="#FFA08B83" Offset="0.04" />
        <GradientStop Color="#FF76625B" Offset="0.5" />
        <GradientStop Color="#FF6C5952" Offset="1" />
    </LinearGradientBrush>
    <LinearGradientBrush x:Key="BrownButtonPressed" EndPoint="0.5,1" StartPoint="0.5,0">
        <GradientStop Color="#FF191919" Offset="0" />
        <GradientStop Color="#FFA08B83" Offset="0.04" />
        <GradientStop Color="#FF76625B" Offset="0.5" />
        <GradientStop Color="#FF6C5952" Offset="1" />
    </LinearGradientBrush>

    <SolidColorBrush x:Key="BlackButtonForeground" Color="#FFE4E4E4" />

    <Style x:Key="StyleBlackButton" TargetType="ContentControl">
        <Style.Setters>
            <Setter Property="Foreground" Value="{StaticResource BlackButtonForeground}" />
            <Setter Property="Background" Value="{StaticResource BlackButton}" />
            <Setter Property="FontFamily" Value="Cambria Math" />
            <Setter Property="FontSize" Value="14" />
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate>
                        <Border x:Name="bd"
                                        CornerRadius="4" 
                                        BorderBrush="#FF2F2F2F" 
                                        BorderThickness="1"
                                        Background="{TemplateBinding Background}"
                                        >
                            <ContentPresenter Content="{TemplateBinding Button.Content}" x:Name="ct"
                                    			HorizontalAlignment="Center" VerticalAlignment="Center">
                            </ContentPresenter>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter Property="Effect" >
                                    <Setter.Value>
                                        <DropShadowEffect ShadowDepth="0" Color="Wheat" BlurRadius="5" />
                                    </Setter.Value>
                                </Setter>
                            </Trigger>
                            <Trigger Property="Button.IsPressed" Value="True">
                                <Setter Property="Button.Background" Value="{StaticResource BlackButtonPressed}" />
                                <Setter Property="Button.RenderTransform" TargetName="ct">
                                    <Setter.Value>
                                        <TranslateTransform X="0" Y="1" />
                                    </Setter.Value>
                                </Setter>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style.Setters>
    </Style>

    <Style x:Key="StyleBrownButton" TargetType="Button" BasedOn="{StaticResource StyleBlackButton}">
        <Style.Setters>
            <Setter Property="Foreground" Value="{StaticResource BlackButtonForeground}" />
            <Setter Property="Background" Value="{StaticResource BrownButton}" />
        </Style.Setters>
        <Style.Triggers>
            <Trigger Property="IsPressed" Value="True">
                <Setter Property="Background" Value="{StaticResource BrownButtonPressed}" />
            </Trigger>
        </Style.Triggers>
    </Style>

    <Style x:Key="DropDownButtonStyle" TargetType="{x:Type Button}" BasedOn="{StaticResource StyleBlackButton}">
    </Style>
    
    <Style TargetType="shared:TextBoxWithHistory">
        <Setter Property="Foreground" Value="{StaticResource Forecolor}" />
        <Setter Property="Background" Value="{StaticResource Charcoal}" />
        <Setter Property="FontFamily" Value="{StaticResource fontFamily}" />
    </Style>

    <Style TargetType="TextBox">
        <Setter Property="Foreground" Value="{StaticResource Forecolor}" />
        <Setter Property="Background" Value="{StaticResource Charcoal}" />
        <Setter Property="FontFamily" Value="{StaticResource fontFamily}" />
    </Style>

</ResourceDictionary>