$4cos^2\left(\frac{\pi}{2}\right)-3sin^2\left(\frac{\pi\:}{2}\right)$
$\sqrt{9\sin^2}\left(4t\right)-1$
$\tan\left(b\right)+\cot\left(b\right)$
$\frac{x^2-x+2}{x^2}$
$\frac{x^{15}+y^{15}}{x^{3}+y^{3}}$
$f\left(x\right)=\left(3-x\right)\sqrt{x-12}$
$45\cdot14$
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