1) $\displaystyle \frac{a+1}{a^3} - \frac{a+2}{a^2} +\frac{a+3}{a} $

Attempt:

$\displaystyle \frac{a^4-a^3+2a^5+a^6}{a^6} $

Is my attempt CORRECT please check it but if not please write your answers in steps...

Thank you for your help and for taking the time to read my question