$x^3-4x^2+2x+x$
$\int_1^3\left(x\sqrt{x^2+x+1}\right)dx$
$\left(\sec\left(a\right)^2-1\right)\left(\sec\left(a\right)^2+1\right)$
$5\left(-3\right)^2-3\left(-3\right)+7$
$\lim_{x\to0}\:\frac{5}{tanx}-\frac{6}{x^2}$
$a+b=8\:y\:a.b\:=\:12\:\:,a^2+b^2$
$\tan\left(x\right)+\cot\left(x\right)+0.5$
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