\(-3(-8a-9b)=24a+27b\)

\(2(-7x-9)=-14x-18\)

\(2(-9a+8b-7)=-18a+16b-14\)

\(-3(6x-7)+2(-8x+9)=-18x+21-16x+18=-34x+39\)

\(2p(7p+5)=14p^2+10p\)

\(3+(-7x+8)=3-7x+8=-7x+11\)

\(7-(-2a-9)=7+2a+9=2a+16\)

\((4a-9)(-7b+3)=-28ab+12a+63b-27\)

\((8x+4)(2x+3)=16x^2+24x+8x+12=16x^2+32x+12\)

\((p+9)(p+6)=p^2+6p+9p+54=p^2+15p+54\)

\((-8a-9)+(-3a+4)=-8a-9-3a+4=-11a-5\)

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

\((x+4)(x-9)(x-6)=(x+4)(x^2-15x+54)=x^3-15x^2+54x+4x^2-60x+216=x^3-11x^2-6x+216\)

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

\((p-3)^2=p^2-6p+9\)

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

\((-6a-7b)^2=36a^2+84ab+49b^2\)

\((9p+8q)(9p-8q)=81p^2-64q^2\)

\((-7x+5)(-7x-5)=49x^2-25\)

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