1. what is the simplified form of (x-3)/(x^2+x-12)• (x+4)/(x^2+8x+16) ? . 2.what is the simplified form of (x+1)/(x^2+x-6) divided by (x^2+5x+4)/(x+ . 3.what is the simplified form of (y)/(y^2-x^2) – (x)/(y^2-x^2) ? . 4. what is the simplified form of (2)/(x^2-x) - (1)/(x) ? .