$\cot^2\left(2x\right)+\cos^2\left(2x\right)+\sin^2\left(2x\right)$
$4\:x\:-\:5\:<\:7$
$\frac{x^{3+1}}{x^2-9}$
$\frac{x^3+4x^2-x+9}{x-7}$
$\frac{a^{5-1}}{a-1}$
$\frac{\cot^2\left(x\right)}{\csc^2\left(x\right)}$
$9m-m^2$
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