与椭圆4x²+9y²=36有相同的焦点，且过点（-3，2）的椭圆方程为______．

Hamlet is the first of the great tragedies. It is generally regarded as Shakespeare’s most popular play on the stage, because it has the qualities of a "blood-and-thunder" thriller and a philosophical exploration of life and death. Try to give a brief comment on the theme of Shakespeare’s Hamlet.