5a(a-8)-3(a+2)(a-2) =5а^2 -40а-3а^2 -12=2а^2 -40а+12
(8p-q)(q+8p)-(p+q)(p-q)=64p^2-q^2-p^2+q^2=63p^2
5a(a-8)-3(a+2)(a-2) =5а^2 -40а-3а^2 -12=2а^2 -40а+12
(8p-q)(q+8p)-(p+q)(p-q)=64p^2-q^2-p^2+q^2=63p^2