Question

integral [e^(1/x^7)]/x^8 dx
any hints for me please?

Answer 1

\[\Large \int\limits e^{\color{orangered}{1/x^7}}\left(\frac{1}{x^8}dx\right)\]
U substitution, let the orange part be your u.
Your du should look very similar to the stuff in the brackets.
It might take a little bit of wiggling around to make them match though.

Answer 2

ah thank you, i got it now ^^