Simplify dfracx2−42x−6\\dfrac{x^2 - 42}{x - 6}dfracx2−42x−6 for xneq6x \\neq 6xneq6
x−7x - 7x−7
x+6x + 6x+6
x+7x + 7x+7
x−6x - 6x−6