$\lim_{x\to\frac{x}{2}}\left(x-\frac{\pi}{2}\right)\cdot\tan\left(x\right)$
$x+3;\:x=2$
$2x^{2}-3x-9$
$\sin\left(1.59\right)+\cos\left(1.59\right)$
$\:8\:x\:-\:12\:y\:+\:32$
$\lim_{x\to\infty}\left(1+\frac{1}{x^2}\right)^{2lnx}$
$4x-7<3x+4$
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