\(8(-3a+9b)=-24a+72b\)

\(5(7a+6)=35a+30\)

\(4(-7p+2q+6)=-28p+8q+24\)

\(4(-7x+6)-3(-8x-2)=-28x+24+24x+6=-4x+30\)

\(-9x(2x+4)=-18x^2-36x\)

\(-2+(7a-3)=-2+7a-3=7a-5\)

\(9-(7p-6)=9-7p+6=-7p+15\)

\((-5x-2)(-7y-8)=35xy+40x+14y+16\)

\((-7a+5)(-9a+3)=63a^2-21a-45a+15=63a^2-66a+15\)

\((x-3)(x+9)=x^2+9x-3x-27=x^2+6x-27\)

\((3x-2)+(-8x+7)=3x-2-8x+7=-5x+5\)

\((-2a-6)-(3a+8)=-2a-6+-3a-8=-5a-14\)

\((a+8)(a-9)(a+5)=(a+8)(a^2-4a-45)=a^3-4a^2-45a+8a^2-32a-360=a^3+4a^2-77a-360\)

\(x(x+5)(x-2)=x(x^2+3x-10)=x^3+3x^2-10x\)

\((a-8)^2=a^2-16a+64\)

\((-8p-3)^2=64p^2+48p+9\)

\((8x-2y)^2=64x^2-32xy+4y^2\)

\((-6x-4y)(-6x+4y)=36x^2-16y^2\)

\((4a+6)(4a-6)=16a^2-36\)

\((x+8)(x-8)=x^2-64\)