$\lim_{x\to0}\left(\frac{sin4x}{x^2+3x+1}\right)$
$\int6\:sin^4\left(x\right)cos\left(x\right)\:dx$
$\lim_{x\to2}\left(\frac{3x^2-2x-9}{4-x^2}\right)$
$a^3-a^2b$
$\frac{cot\cdot tan-sen^2}{2\:sen\cdot cot}$
$\lim_{x\to\infty}\left(\ln2x-\ln\left(x+5\right)\right)$
$m^{18}-512k^6$
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