$\frac{2x-7}{4x+8}-3\le0$
$x^5+3x^2=0$
$4\sin^2\left(x\right)\cos^2\left(x\right)$
$\tan^2\left(45-\frac{x}{2}\right)$
$36-b^2$
$214,8+3222$
$5y^2+xy$
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