\(8(-2a+5b)=-16a+40b\)

\(9+(-3x-8)=9-3x-8=-3x+1\)

\(-8-(9p+2)=-8-9p-2=-9p-10\)

\(-7(-6a+2)=42a-14\)

\(4(-7x+8)+2(-3x+6)=-28x+32-6x+12=-34x+44\)

\(5a(9a-7)=45a^2-35a\)

\((-8a+3)+(-7a-4)=-8a+3-7a-4=-15a-1\)

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

\(-3(4a-2b+7)=-12a+6b-21\)

\((-7a-5)(3b-4)=-21ab+28a-15b+20\)

\((-3p+2)(-9p-4)=27p^2+12p-18p-8=27p^2-6p-8\)

\((x+5)(x-8)=x^2-8x+5x-40=x^2-3x-40\)

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

\((2x+6)^2=4x^2+24x+36\)

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

\((a+6)(a+5)(a-2)=(a+6)(a^2+3a-10)=a^3+3a^2-10a+6a^2+18a-60=a^3+9a^2+8a-60\)

\(p(p-2)(p-3)=p(p^2-5p+6)=p^3-5p^2+6p\)

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

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

\((a+8)(a-8)=a^2-64\)