\(4(-6x-2y)=-24x-8y\)

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

\(-8-(-7p-2)=-8+7p+2=7p-6\)

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

\(3(-6a+2)+4(8a-9)=-18a+6+32a-36=14a-30\)

\(-8a(-7a-9)=56a^2+72a\)

\((-2x+5)+(6x-8)=-2x+5+6x-8=4x-3\)

\((-4x-8)-(6x+9)=-4x-8+-6x-9=-10x-17\)

\(-3(-5x+2y-4)=15x-6y+12\)

\((4p-3)(8q+9)=32pq+36p-24q-27\)

\((-2x+6)(-7x+3)=14x^2-6x-42x+18=14x^2-48x+18\)

\((a+4)(a-6)=a^2-6a+4a-24=a^2-2a-24\)

\((a+9)^2=a^2+18a+81\)

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

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

\((a-8)(a+6)(a+7)=(a-8)(a^2+13a+42)=a^3+13a^2+42a-8a^2-104a-336=a^3+5a^2-62a-336\)

\(a(a-5)(a+4)=a(a^2-a-20)=a^3-a^2-20a\)

\((-8x-9y)(-8x+9y)=64x^2-81y^2\)

\((-8p-7)(-8p+7)=64p^2-49\)

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