$50+\frac{4^2}{4}$
$\left(tanx+\left(\frac{1}{tanx}\right)\right)\left(2cot\left(x\right)\right)$
$\frac{x^{5m}}{x^{2m}}+\frac{x^{14m}}{x^{11m}}$
$\left(9x-y\right)^2$
$-2.05\:x\:2$
$-2x^3\:+\:4x^2\:+\:-2\:-\:1$
$\frac{3x^2+x+2}{x+1}$
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