\(-6(7a-4b)=-42a+24b\)

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

\(-8-(3p+4)=-8-3p-4=-3p-12\)

\(-5(3x-2)=-15x+10\)

\(4(9a+5)+3(-7a+6)=36a+20-21a+18=15a+38\)

\(5x(-2x+4)=-10x^2+20x\)

\((-9x-4)+(-8x+7)=-9x-4-8x+7=-17x+3\)

\((4a+6)-(5a-3)=4a+6+-5a+3=-a+9\)

\(8(-2a+7b-4)=-16a+56b-32\)

\((3p+5)(-4q-9)=-12pq-27p-20q-45\)

\((-4x+9)(7x+2)=-28x^2-8x+63x+18=-28x^2+55x+18\)

\((x+3)(x-5)=x^2-5x+3x-15=x^2-2x-15\)

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

\((2x-7)^2=4x^2-28x+49\)

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

\((x+5)(x+7)(x+9)=(x+5)(x^2+16x+63)=x^3+16x^2+63x+5x^2+80x+315=x^3+21x^2+143x+315\)

\(p(p+4)(p+6)=p(p^2+10p+24)=p^3+10p^2+24p\)

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

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

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