\(-2(5a-8b)=-10a+16b\)

\(3(7x+9)=21x+27\)

\(-8(-4a-7b+9)=32a+56b-72\)

\(2(-4x-7)+3(5x-8)=-8x-14+15x-24=7x-38\)

\(-2p(6p+5)=-12p^2-10p\)

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

\(5-(-4x-9)=5+4x+9=4x+14\)

\((3x+5)(2y+9)=6xy+27x+10y+45\)

\((-2a-8)(6a+4)=-12a^2-8a-48a-32=-12a^2-56a-32\)

\((a-8)(a-7)=a^2-7a-8a+56=a^2-15a+56\)

\((-3p-4)+(-7p+2)=-3p-4-7p+2=-10p-2\)

\((-6a+9)-(-3a-4)=-6a+9+3a+4=-3a+13\)

\((a-5)(a-4)(a+3)=(a-5)(a^2-a-12)=a^3-a^2-12a-5a^2+5a+60=a^3-6a^2-7a+60\)

\(x(x-5)(x+6)=x(x^2+x-30)=x^3+x^2-30x\)

\((a+6)^2=a^2+12a+36\)

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

\((4x+8y)^2=16x^2+64xy+64y^2\)

\((3x-7y)(3x+7y)=9x^2-49y^2\)

\((9x+2)(9x-2)=81x^2-4\)

\((a+5)(a-5)=a^2-25\)