\(-6(2x+9y)=-12x-54y\)

\(7+(4a+3)=7+4a+3=4a+10\)

\(8-(-4p+9)=8+4p-9=4p-1\)

\(-7(9a-5)=-63a+35\)

\(2(5x-7)+3(-4x-6)=10x-14-12x-18=-2x-32\)

\(-6x(5x-7)=-30x^2+42x\)

\((4p+9)+(8p+5)=4p+9+8p+5=12p+14\)

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

\(-2(5p+4q-3)=-10p-8q+6\)

\((9x-8)(2y+5)=18xy+45x-16y-40\)

\((-5x-4)(-7x+9)=35x^2-45x+28x-36=35x^2-17x-36\)

\((a-9)(a-3)=a^2-3a-9a+27=a^2-12a+27\)

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

\((-8p-3)^2=64p^2+48p+9\)

\((4a+3b)^2=16a^2+24ab+9b^2\)

\((a+9)(a-7)(a+8)=(a+9)(a^2+a-56)=a^3+a^2-56a+9a^2+9a-504=a^3+10a^2-47a-504\)

\(x(x-8)(x+6)=x(x^2-2x-48)=x^3-2x^2-48x\)

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

\((3p-9)(3p+9)=9p^2-81\)

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