$4x^2\:+\:8x\:-\:32\:=\:0$
$\frac{1}{\cos\left(x\right)}-\frac{\cos\cot\left(x\right)\left(x\right)}{1+\cos\left(x\right)}$
$\ln\left(2x^3\right)$
$\frac{0.5}{9}$
$\sec^2x-1=\sin^2x\cdot\sec^2x$
$5x^2+60x+25=0$
$\frac{x^2+1}{x^2-1}$
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