$\left(\:x^{10}\:-5y^2\right)^2$

$\lim_{x\to0}\left(\frac{2x^2}{cos\left(x\right)}\right)$

$\frac{\tan\left(a\right)\cot\left(a\right)}{\sec\left(a\right)}$

$\frac{x^3+5x^2-7x+3}{x-1}$

$\int\frac{5x^2+5}{x^3+5x}dx$

$\int\frac{2x^2\:+\:13}{\left(1-x\right)\left(x^2\:+4\right)}dx$

$=6+x^2+1$