\(-7(9p-6q)=-63p+42q\)

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

\(7-(3x-9)=7-3x+9=-3x+16\)

\(-7(-4a+8)=28a-56\)

\(2(4x-7)+3(-8x+6)=8x-14-24x+18=-16x+4\)

\(-6x(9x-8)=-54x^2+48x\)

\((-7p-6)+(-4p+2)=-7p-6-4p+2=-11p-4\)

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

\(4(5x+9y-2)=20x+36y-8\)

\((6x-3)(4y-2)=24xy-12x-12y+6\)

\((3a-9)(8a+5)=24a^2+15a-72a-45=24a^2-57a-45\)

\((p+8)(p+9)=p^2+9p+8p+72=p^2+17p+72\)

\((a+5)^2=a^2+10a+25\)

\((-7x-8)^2=49x^2+112x+64\)

\((-9a-6b)^2=81a^2+108ab+36b^2\)

\((a-4)(a+3)(a-7)=(a-4)(a^2-4a-21)=a^3-4a^2-21a-4a^2+16a+84=a^3-8a^2-5a+84\)

\(x(x-9)(x+4)=x(x^2-5x-36)=x^3-5x^2-36x\)

\((9p-5q)(9p+5q)=81p^2-25q^2\)

\((-3x-4)(-3x+4)=9x^2-16\)

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