Waser2000 2) 5( a + b )^2/ ( a + b)^2 = 5/1 = 5
4) (q + 7)^2/ ((7-q)(7+q))^2 = q + 7\ (7 - q)^2
6) (c-4)(c+4)/(c-4)^2 = c + 4\ c - 4
8) c^2(a-b)(a+b)/x(a-b)^2 = c^2( a + b)\ x( a - b)