Ամբողջ արտահայտություն

2(x-1)+3(2-x)=2x-2+6-3x=-x+4

2ab(3-2a)+4b(3a-7a²)=6ab-4a²b+12ab-28a²b=18ab-32a²b

Ա)(5ab²+4b³)(3ab³-4a²)-18a²b³=15a²b⁵-20a³b²+12b⁶a-16b³a²-18a²b³=

=15a²b⁵-20a³b²+12b⁶a-34b³a²

Գ)(x³+x²y+xy²+y³)(x-y)-x²y(x-y)=x⁴-x³y+x³y-x²y²+x²y²-xy³+xy³-y⁴=x⁴-y⁴

Բ)(7x³y²-xy)(-2x²y²+5xy³)+12x⁵y⁴=-14x⁵y⁴+35x⁴y⁵+2x³y³-5x²y⁴+12x⁵y⁴=

=-2x⁵y⁴+35x⁴y⁵2x³y³-5x²y⁴

a²(a²-b²)-(a³-a²b+ab²-b³)(a+b)=a⁴-a²b²-a⁴+a³b-a³b-a²b²+a²b²+ab³-ab³-b⁴=

=-a²b²-b⁴

(x²+y²+x+y)(x+y+xy)=x³+x²y+x³y+y²x+y³+xy³+x²+xy+x²y+xy+y²+xy²=

=x³+2x²y+x³y+2xy²+y³+xy³+x²+2xy+y²+xy²