\(7(-4x-3y)=-28x-21y\)

\(8(-6p+5)=-48p+40\)

\(7(8a+4b+9)=56a+28b+63\)

\(3(-8x+5)-2(-6x+7)=-24x+15+12x-14=-12x+1\)

\(5a(-2a-8)=-10a^2-40a\)

\(-4+(-7x+6)=-4-7x+6=-7x+2\)

\(6-(9a-3)=6-9a+3=-9a+9\)

\((-3x+4)(-7y+9)=21xy-27x-28y+36\)

\((2a-6)(7a+9)=14a^2+18a-42a-54=14a^2-24a-54\)

\((p-3)(p-5)=p^2-5p-3p+15=p^2-8p+15\)

\((5a+2)+(-6a-7)=5a+2-6a-7=-a-5\)

\((2x-7)-(9x+8)=2x-7+-9x-8=-7x-15\)

\((a-4)(a-5)(a+2)=(a-4)(a^2-3a-10)=a^3-3a^2-10a-4a^2+12a+40=a^3-7a^2+2a+40\)

\(x(x-8)(x-9)=x(x^2-17x+72)=x^3-17x^2+72x\)

\((p-5)^2=p^2-10p+25\)

\((-7x+6)^2=49x^2-84x+36\)

\((5a-8b)^2=25a^2-80ab+64b^2\)

\((5a+8b)(5a-8b)=25a^2-64b^2\)

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

\((x-2)(x+2)=x^2-4\)