$3.25+4.98$

$\frac{\csc\left(x\right)}{\cot^2\left(x\right)}=tan\:x\:sec\:x$

$\int3\sqrt{x^4}-x^2\:dx$

$\frac{sen\left(x\right)^4-cos\left(x\right)^4}{1-2\cdot sin\left(x\right)^2}=1$

$\frac{x^2+x+1}{6x^2+8x}$

$\int_1^{\infty}\left(\frac{1}{110x^2+\:221x\:+\:110}\right)dx$

$\int x\left(x^2-1\right)^2^2dx$