$20+890+51\cdot$
$5\tan\left(x\right)\cos\left(x\right)+2=3\sin\left(x\right)+3$
$\frac{n}{2}-\frac{21}{2n}=2$
$\frac{\sqrt[4]{8}}{\sqrt[3]{2^2}}\cdot\:\frac{\sqrt[5]{20}}{\sqrt[6]{5.2}}$
$cos\left(x-\frac{\pi}{4}\right)=0$
$\frac{3x-1}{2x-1}<-4$
$( 6 x y ) ( b c ) ( b x )$
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