$\int\frac{\left(x^5+x-1\right)}{x\left(x^3+1\right)}dx$

$7x^2-8x+1$

$\lim_{x\to\left(\frac{\pi}{2}\right)}\left(\frac{1+tan\left(x\right)}{sec\left(x\right)}\right)$

$2\left(3-7\right)$

$\lim_{x\to\infty}\:\frac{0^{2n+1}}{1+0^{2n}}$

$\lim_{x\to0}\frac{x^3+2x+3}{x}$

$\int5\left(6x-7\right)^9dx$