$-6\:-\:13\:+\:4\:-\:10\:+\:2$
$24\:-\:14\:-\:\left(-10\right)$
$9\:.\:\left(\left(-2\right)^3+5\right).\frac{6^2}{18}$
$\frac{1}{1+\tan\left(x\right)^2}$
$\left(\sin\left(x\right)+\cos\left(x\right)\right)^2\:+\:\left(sin\left(x\right)-\cos\left(x\right)\right)^2$
$\int\frac{x-5}{x^2-49}dx$
$9y+y$
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