$\frac{\cos\theta}{\sqrt{1-\sin^2\theta}}$
$\left(4a^2+5\right)^4$
$\int\frac{13x-12}{x^2-3x+2}dx$
$\int_0^{400}\left(0.002x^3\right)dx$
$-16w\:+7w\:-5w$
$6\:sinb\:+3\:=\:4\:sinb\:+\:5$
$\sqrt{1-0.2116}$
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