Please help!!
1. x/x+3 + x+2/x+5


2. x+4/x^2+5x+6 • x+3/x^2−16


3. 2/x^2−9 − 3x/x^2−5x+6


4. x+4/x^2−5x+6 ÷ x^2−16/x+3

5. Compare and contrast division of integers to division of rational expressions.