\(-3(2p-8q)=-6p+24q\)

\(-7(5a+2)=-35a-14\)

\(-3(-7x+9y-8)=21x-27y+24\)

\(3(-5a-7)-4(9a-8)=-15a-21-36a+32=-51a+11\)

\(4x(5x+7)=20x^2+28x\)

\(-3+(-4a+5)=-3-4a+5=-4a+2\)

\(-7-(-5p-9)=-7+5p+9=5p+2\)

\((-5a+3)(6b-7)=-30ab+35a+18b-21\)

\((5x-2)(-6x+8)=-30x^2+40x+12x-16=-30x^2+52x-16\)

\((x+6)(x-3)=x^2-3x+6x-18=x^2+3x-18\)

\((3p+8)+(4p-2)=3p+8+4p-2=7p+6\)

\((-7a-8)-(3a-4)=-7a-8+-3a+4=-10a-4\)

\((a+3)(a+8)(a-4)=(a+3)(a^2+4a-32)=a^3+4a^2-32a+3a^2+12a-96=a^3+7a^2-20a-96\)

\(x(x+4)(x+9)=x(x^2+13x+36)=x^3+13x^2+36x\)

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

\((-8p+3)^2=64p^2-48p+9\)

\((-4x+5y)^2=16x^2-40xy+25y^2\)

\((-4x+7y)(-4x-7y)=16x^2-49y^2\)

\((-7a+2)(-7a-2)=49a^2-4\)

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