\(5(-8a+9b)=-40a+45b\)

\(8+(5x-2)=8+5x-2=5x+6\)

\(-2-(-9p-5)=-2+9p+5=9p+3\)

\(-3(-6x-5)=18x+15\)

\(-2(-6a+9)+4(-3a+7)=12a-18-12a+28=10\)

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

\((-8x+5)+(7x+6)=-8x+5+7x+6=-x+11\)

\((3a+6)-(-5a-9)=3a+6+5a+9=8a+15\)

\(-7(8a-3b-2)=-56a+21b+14\)

\((2p-8)(3q+5)=6pq+10p-24q-40\)

\((-8x-4)(2x-5)=-16x^2+40x-8x+20=-16x^2+32x+20\)

\((a-9)(a+3)=a^2+3a-9a-27=a^2-6a-27\)

\((x-1)^2=x^2-2x+1\)

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

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

\((x-3)(x+5)(x+7)=(x-3)(x^2+12x+35)=x^3+12x^2+35x-3x^2-36x-105=x^3+9x^2-x-105\)

\(a(a-2)(a+7)=a(a^2+5a-14)=a^3+5a^2-14a\)

\((9p+6q)(9p-6q)=81p^2-36q^2\)

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

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