\(-5(8x+4y)=-40x-20y\)

\(5+(-4x-8)=5-4x-8=-4x-3\)

\(-8-(-7a+9)=-8+7a-9=7a-17\)

\(-5(3p+4)=-15p-20\)

\(2(-8a+5)-4(6a+3)=-16a+10-24a-12=-40a-2\)

\(-9x(7x-2)=-63x^2+18x\)

\((-4p-3)+(5p-6)=-4p-3+5p-6=p-9\)

\((-5a-2)-(-8a+7)=-5a-2+8a-7=3a-9\)

\(9(3a+5b+4)=27a+45b+36\)

\((-2x+3)(7y+5)=-14xy-10x+21y+15\)

\((-2a+6)(-9a+5)=18a^2-10a-54a+30=18a^2-64a+30\)

\((x-4)(x-8)=x^2-8x-4x+32=x^2-12x+32\)

\((p-1)^2=p^2-2p+1\)

\((-5x+3)^2=25x^2-30x+9\)

\((-8a-7b)^2=64a^2+112ab+49b^2\)

\((a-4)(a+6)(a+8)=(a-4)(a^2+14a+48)=a^3+14a^2+48a-4a^2-56a-192=a^3+10a^2-8a-192\)

\(x(x-8)(x-2)=x(x^2-10x+16)=x^3-10x^2+16x\)

\((-4p+8q)(-4p-8q)=16p^2-64q^2\)

\((-5x+3)(-5x-3)=25x^2-9\)

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