\(2(5x+4y)=10x+8y\)

\(6+(-2p+8)=6-2p+8=-2p+14\)

\(7-(8a-4)=7-8a+4=-8a+11\)

\(-5(3x+7)=-15x-35\)

\(-2(-8a+9)-3(-7a+6)=16a-18+21a-18=37a-36\)

\(-8p(-9p+5)=72p^2-40p\)

\((-6a-2)+(8a-4)=-6a-2+8a-4=2a-6\)

\((-3x-8)-(4x+2)=-3x-8+-4x-2=-7x-10\)

\(2(4a+3b-9)=8a+6b-18\)

\((2x-5)(7y-3)=14xy-6x-35y+15\)

\((8p+2)(3p+5)=24p^2+40p+6p+10=24p^2+46p+10\)

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

\((x-3)^2=x^2-6x+9\)

\((-5p-2)^2=25p^2+20p+4\)

\((-6x+3y)^2=36x^2-36xy+9y^2\)

\((x+6)(x+3)(x+2)=(x+6)(x^2+5x+6)=x^3+5x^2+6x+6x^2+30x+36=x^3+11x^2+36x+36\)

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

\((2x+5y)(2x-5y)=4x^2-25y^2\)

\((-9a-5)(-9a+5)=81a^2-25\)

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