$x^2+3x-2>0$
$\frac{30.888}{15000}$
$\lim_{x\to\infty}\:\sqrt{\frac{9x^2-5}{2x+3}}$
$csc\left(4x+5\pi\right)=-\csc\left(4x\right)$
$16x^2-31x+14=0$
$\frac{\cos\left(90^{\circ}-a\right)}{\sena}$
$-\left(2b-3a\right)\left(a-b\right)$
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