$4-x^2\le-2$
$\frac{sin^2\left(t\right)}{\cos^2\left(t\right)}=sin\left(t\right)\tan\left(x\right)$
$\left(\sin\left(a\right)+\cos\left(a\right)\right)^2+\left(\sin\left(a\right)-\cos\left(a\right)\right)^2$
$m^3+6m^2+9m$
$x+2y+z+t=3$
$\frac{a}{\sqrt[3]{a}}^3$
$6xy^2+12xy+xy$
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