\(4(7a+5b)=28a+20b\)

\(-5(-6a+9)=30a-45\)

\(-3(7x-9y-2)=-21x+27y+6\)

\(-4(-5p-3)+2(-6p-8)=20p+12-12p-16=8p-4\)

\(-8x(-6x+5)=48x^2-40x\)

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

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

\((9x+8)(3y-5)=27xy-45x+24y-40\)

\((-6a+2)(7a-9)=-42a^2+54a+14a-18=-42a^2+68a-18\)

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

\((8a-5)+(4a+9)=8a-5+4a+9=12a+4\)

\((-5x+3)-(-6x-7)=-5x+3+6x+7=x+10\)

\((x-4)(x-6)(x-7)=(x-4)(x^2-13x+42)=x^3-13x^2+42x-4x^2+52x-168=x^3-17x^2+94x-168\)

\(x(x-3)(x+8)=x(x^2+5x-24)=x^3+5x^2-24x\)

\((p+4)^2=p^2+8p+16\)

\((-8a-9)^2=64a^2+144a+81\)

\((6a+8b)^2=36a^2+96ab+64b^2\)

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

\((-2p-4)(-2p+4)=4p^2-16\)

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