Решить! заранее ) 7 класс (y-4) (y+4)=? (p-7) (7+p)=? (4+5y) (5y-4)=? (7х-2) (7х+2)=? (8b+5a) (5a-8b)=? (10х-6с) (10х+6с)=?

(y-4)(y+4)=y^2-16
(p-7)(7+p)=p^2-49
(4+5y)(5y-4)=25y^2-16
(7x-2)(7x+2)=49x^2-4
(8b+5a)(5a-8b)=25a^2-64b^2
(10x-6c)(10x+6c)=100x^2-36c^2