Please help me solve memory leaks in a c++ class.

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C++

Hello!
I recently started studying c++ and came across this class:

class ShapeList {
        public:
          ShapeList() { }
          ~ShapeList() { }  
          void insert(const Shape& shape) {
                 shapes.insert(new Shape(shape));
            }
            void print () const {
            for (listType::const_iterator it = shapes.begin(); it != shapes.end(); ++it) {
            std::cout << *[*it] << std::endl;
            }
            }
            private:
            typedef std::set<Shape*> listType;
            listType shapes;
            };

I can't figure out how to fix this memory leak:

shapes.insert(new Shape(shape));

-google only tells me how to delete one kind of "new" object:

char* str1 = new char [30];
  delete [] str1;

Also, I can't figure out how to solve this questions:
- If you are calling a function like void f(ShapeList sl) some memory leaks will occur. Explain the causes and propose fixes.
Is this is because of the memory leak above? I can't see other problems and google is scarce on this topic..

- Modify the class ShapeList to support stream output, i.e. cout << sl , where sl is an instance fo class ShapeList.

Thank you for your time.