$2^2+33$
$8cos^2x=16cosx$
$\frac{x^7\left(x-6\right)^7}{\left(x^2+3\right)^6}$
$7-19+15-8+6-13-6$
$\left(5x-x^2+3\right)+\left(12-7x-9x^2\right)$
$n+4+9+5n$
$\frac{cos\left(x\right)+1}{\:sin\:^3\left(x\right)}\:=\frac{\csc\left(x\right)}{\:1\:-\cos\left(x\right)}$
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