Oblicz Sumy algebraiczne

(2x+3y)(x-2y)(-3x+y)
(2x²-4xy+3xy-6y²)(-3x+y)
(2x²-xy-6y²)(-3x+y)
-6x³+2x²y+3x²y-xy²+18xy²-6y³
-6x³+5x²y+17xy²-6y³