$x2\:-20+x\::\:x+5$
$\int\frac{3}{\left(x^2+3\right)^{\frac{5}{2}}}dx$
$\lim_{x\to0}\left(\frac{6}{-cosx}\right)$
$\frac{3c^3+7c^2-4c+16}{c+3}$
$\lim_{x\to4}\left(3x^2-10x\right)$
$35\cdot27$
$\frac{\tan\:^2\left(x\right)}{\sec\left(x\right)-1}=1+\sec\left(x\right)$
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