$\lim_{x\to14}\:\sqrt{x^2-196}$
$2x^3\:0-9x^2\:+12x\:-2$
$\int\frac{33x^2}{\left(x+1\right)\left(x^2+1\right)}dx$
$\left(3m+3\right)\left(3m-3\right)$
$-\left(-5+6\right)-\left(-1\right)+\left(12-8\right)-\left(-3\right)$
$a^2+3\cdot b=21$
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