\(2(9a+3b)=18a+6b\)

\(2+(8x+5)=2+8x+5=8x+7\)

\(-6-(5a-4)=-6-5a+4=-5a-2\)

\(-7(-9x-3)=63x+21\)

\(4(-9p-8)-2(-6p-3)=-36p-32+12p+6=-24p-26\)

\(-4x(-3x+5)=12x^2-20x\)

\((-8a-2)+(7a-9)=-8a-2+7a-9=-a-11\)

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

\(4(-5p+3q-2)=-20p+12q-8\)

\((-7a-9)(-4b-8)=28ab+56a+36b+72\)

\((6x+2)(7x+8)=42x^2+48x+14x+16=42x^2+62x+16\)

\((x+4)(x+3)=x^2+3x+4x+12=x^2+7x+12\)

\((a-4)^2=a^2-8a+16\)

\((-5p-8)^2=25p^2+80p+64\)

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

\((a-4)(a+8)(a-7)=(a-4)(a^2+a-56)=a^3+a^2-56a-4a^2-4a+224=a^3-3a^2-60a+224\)

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

\((-4a-8b)(-4a+8b)=16a^2-64b^2\)

\((-4x+9)(-4x-9)=16x^2-81\)

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