$\int\frac{4t\:+6}{2t+1}\:\:\:dx$
$\lim_{x\to0}\left(\frac{\left(e^t-1\right)}{t^7}\right)$
$\left(a^2+\:b^2\right)\:=\:\left(a+b\right)^2\:-\:2ab$
$182-1182-1182-1$
$\lim_{x\to\infty}\left(\frac{cos\left(\frac{4}{x}\right)}{x^{-2}}\right)$
$2x^2-12x+18$
$5\sqrt{7}+2\sqrt{7}-\sqrt{7}-7\sqrt{7}$
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