Evaluate the definite integral.

${\displaystyle \underset{0}{\overset{1}{}}}\frac{3x^5+x}{x^2+x^6+1}dx$

${\displaystyle \underset{0}{\overset{1}{}}}\frac{3x^5+x}{x^2+x^6+1}dx=,(Simplify$ your answer.$)$