$-15\:-\:\left(-3\:+\:2\right)\:$

$2\left(\arcsin\left(0.5\right)+\left(\frac{0.5}{\sqrt{1-\left(0.5\right)^2}}\right)\right)$

$\lim_{x\to\infty}\left(\sqrt{2x^2+3x-2}-\sqrt{2x^2+2}\right)$

$\frac{d}{dx}\:\frac{2}{3}x^2cosx-\frac{3}{x}$

$\sec\left(x\right)\csc\left(x\right)-2\sec\left(x\right)-\csc\left(x\right)+2$

$29-\left(-13\right)$

$5^2-2\left(3+5\cdot\:2\right)+7$