Math Review Plz. Help?

Question

evaluate the integral ( ^ means raised to)

1.) integration of: X^2 +2X - 1 / X^3 - X dx

2.) integration of: X^3 - 2X^2 + X + 1 / X^4 + 5X^2 + 4 dx

3.) integration of: x tan ^-1 x dx

Answer 1

Just take the exponent and add one to it, then put that number in the denominator. ex: X^2 = (X^3)/3.