1. quotient integration!

i always have trouble with this type of integration and i dont know why... please help

http://img81.imageshack.us/img81/570...53f7e282eu.gif

2. Re-writing

The integral can be re-written to be:

$\displaystyle \int_{0}^1 \int_{0}^{x^2} {\frac{y}{7x^5+1}} \,dy \, dx$