$\left(4a+1\right)^2$
$3\cos\left(2x\right)+1=0$
$\frac{12x}{x+3}>x+3$
$5-3x=-4$
$x^3-x^2y^2=-9$
$7\left(2x^3+9x^2+9x+7\right)$
$\frac{x^{45}-y^{-30}}{x^3-y^{-2}}$
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