TAREA DE ALGEBRA!!!!!

Multiplicación

1)5(x-2y)= 5x-10y

2)(x^2+2x)= 3x^6y+6x^5y

3)(x-3)(x+5)= x^2+5x-3x-15

4)(x+7)(x-4)=x^2-4x-5x-28x

5)(x-4)(x-3)=
x^2-3x-4x+12
x^2-1x+12

6)(3x-4)(6x-2)=
18x^2-6x-24x+28
18x^2-30x+8

7)(-4x(2x-3)= 18x^2+12x

8)(3x^2-4y)(-5y^3)=-15x^2y^3+20y^4

9)(2x+3)(6x^3+4y^2-2x+7)=
12x^4+8x^3-4x^2+14x+18x^3+12x^2-6x+21
12x^4+26x^3+8x^2+8x+21

10)= 32x^7+64x^6+252x^5+108x^4-756x^3-260y^2