$\left(-30\right)\left(-2\right)\left(-1\right)\left(-4\right)$
$\int\frac{\sqrt{y^2-1}}{y^3}dx$
$3\frac{5}{x}$
$\frac{1}{\cos^2\left(x\right)}=\tan^2\left(x\right)+\sin^2\left(x\right)+\cos^2\left(x\right)$
$\cos2x=4\sin x-5$
$+\left(-6-3\right)-\left(7-5+4\right)$
$-2\left[-4+\left(-2\right)-\left(-1\right)\right]-4$
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