Equation Calculator with Graphing

<Window x:Class="Calculator.MainWindow"
        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"
        xmlns:local="clr-namespace:Calculator"
        Title="Jesper's Calculator" Height="420" Width="650" WindowStartupLocation="CenterScreen"
        Background="{StaticResource Charcoal}"
        >
    <Window.Resources>

        <Style TargetType="Label" >
            <Setter Property="Foreground" Value="{StaticResource Forecolor}" />
            <Setter Property="FontSize" Value="16" />
            <Setter Property="FontFamily" Value="{StaticResource fontFamily}" />
        </Style>

        <Style TargetType="ListBoxItem">
            <Style.Resources>
                <SolidColorBrush x:Key="{x:Static SystemColors.ControlBrushKey}" Color="#fF242424"/>
                <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="#FF545454"/>
            </Style.Resources>
            <Setter Property="Foreground" Value="{StaticResource Forecolor}" />
        </Style>


        <Style TargetType="TabItem">
            <Style.Setters>
                <Setter Property="Foreground" Value="#FF7F7F7F" />

                <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 Margin="5,2,5,2" Content="{TemplateBinding TabItem.Header}" 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="TabItem.IsSelected" Value="True">
                                    <!--Setter Property="Background" Value="{StaticResource BrownButton}" /-->
                                    <Setter Property="Foreground" Value="{StaticResource BlackButtonForeground}" />
                                    <Setter Property="TabItem.RenderTransform" TargetName="ct">
                                        <Setter.Value>
                                            <TranslateTransform X="0" Y="-1" />
                                            <!--ScaleTransform ScaleX="1.2" ScaleY="1.2"/-->
                                        </Setter.Value>
                                    </Setter>
                                </Trigger>
                            </ControlTemplate.Triggers>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style.Setters>
        </Style>


    </Window.Resources>
    <TabControl Background="{StaticResource Charcoal}" SelectedIndex="0">
        <TabItem Header="Calculator" Height="25">
            <local:CalculatorCtrl x:Name="m_calculatorCtrl">
            </local:CalculatorCtrl>
        </TabItem>
        <TabItem Header="Graph" Height="25">
            <local:GraphForm  x:Name="m_graphCtrl">
            </local:GraphForm>
        </TabItem>
        <!--TabItem Header="test">
            <local:TestForm>
            </local:TestForm>
        </TabItem-->
    </TabControl>
</Window>