$-4-\left(-3\right)+8-9$
$7x<35$
$\left(3-a\right)\left(2-a\right)$
$\sqrt[2]{625}$
$sin2x-tanx=tanxcosx$
$\frac{\cos^2x}{\sin\left(x\right)}+\:\frac{1}{\csc\left(x\right)}=\:\csc\left(x\right)$
$\lim_{x\to4}\left(\frac{\sqrt{x+2}-\sqrt{2}}{x}\right)$
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