$\frac{3x^3+x^2+2}{\left(x^2+1\right)^2}$

$\int\left(5\tan\left(3x\right)\sec\left(3x\right)^6\right)dx$

$\left(-24\right)-\left(-18\right)-\left(+25\right)-\left(8\right)-\left(+12\right)$

$\sqrt{a}\cdot\sqrt{a}\cdot\sqrt{a}$

$\int\left(\frac{x}{\left(x^4+4\right)}\right)dx$

$\int x^2\sqrt{ax^3+b\:}dx$

$n^2-3n-28=0$