\(-5(-4x+9y)=20x-45y\)

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

\(9(6a+4b-3)=54a+36b-27\)

\(3(-5a-8)-4(9a-7)=-15a-24-36a+28=-51a+4\)

\(-7p(-5p-4)=35p^2+28p\)

\(8+(2x+9)=8+2x+9=2x+17\)

\(3-(7p-6)=3-7p+6=-7p+9\)

\((-8a+2)(5b-7)=-40ab+56a+10b-14\)

\((6a+9)(5a-2)=30a^2-12a+45a-18=30a^2+33a-18\)

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

\((-7a-2)+(6a+3)=-7a-2+6a+3=-a+1\)

\((5a+9)-(-4a+2)=5a+9+4a-2=9a+7\)

\((p-2)(p-7)(p+9)=(p-2)(p^2+2p-63)=p^3+2p^2-63p-2p^2-4p+126=p^3-67p+126\)

\(a(a-5)(a+2)=a(a^2-3a-10)=a^3-3a^2-10a\)

\((x-7)^2=x^2-14x+49\)

\((-3x+7)^2=9x^2-42x+49\)

\((-9a-3b)^2=81a^2+54ab+9b^2\)

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

\((-2a+3)(-2a-3)=4a^2-9\)

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