Question 445234
<pre>
Find {{{int((1/x^3), dx)}}}

Rewrite as 

{{{int((x^(-3)), dx)}}}

Use formula {{{int((u^n), dx)=u^(n+1)/(n+1)+C}}}

{{{int((x^(-3)), dx)= x^(-3+1)/(-3+1)+C = x^(-2)/-2+C=-1/(2x^2)+C}}}

Edwin<pre>