$6x^2-12x+12$
$sec^2\left(a\right)\left(\cot^2\left(a\right)-\cos^2\left(a\right)\right)=cot^2\left(a\right)$
$\sqrt{\left(7+x\right)\left(7-x\right)+\left(x-7\right)\left(x+7\right)}$
$\frac{sin^2cot}{tan}$
$\left(x^6\right)\left(x^{\frac{1}{2}}\right)$
$\lim_{x\to0}\left(\frac{\sqrt{1-x}}{x^y\ln\left(x\right)}\right)$
$\sqrt{5\:\left(5-2\right)\:\left(5-3\right)\:\left(5-4\right)}$
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