$\frac{1-\sin\left(x\right)^2}{\sin\left(x\right)^2}$
$x^5-x^3+2x^4-3x^6$
$\int_{\frac{\pi}{8}}^{\frac{\pi}{6}}\left(\csc4x-\cot4x\right)dx$
$y'=5cos\left(t\right)-4y$
$5m^2n^2z^3+20m^3n^3z^2+25m^5n^4z^5$
$cos^4x\:+2cos^2x\:+\:1$
$\int_0^430-3xdx$
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