$\left(4n^3+9x^5\right)^2$
$\tan\left(x\right)\cdot\csc\left(x\right)-\sec\left(x\right)=0$
$\frac{a}{x}+\frac{b}{x^2}+\frac{c}{x-1}$
$\lim_{x\to45}\left(tan\:x\right)$
$x^2+20x+100=0$
$5x-8=3x$
$x^2-3x+3+\frac{2}{x+1}$
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