$\int_{\pi}^{2\pi}\left(\frac{\cos\left(x\right)}{x}\right)dx$
$16x^2-16x-24$
$\sqrt{3}.\:4\sqrt{3}$
$\tan^2x+1=\csc^2x$
$\frac{\left(1-sin^2x\right)}{1}$
$1-\frac{2\tan\left(x\right)}{1-2\tan\left(x\right)}$
$2\cdot\:\left(\frac{dy}{dt}\right)+3y=7$
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