$\left(1-2\right)\cdot3^2$
$\frac{e^x}{-x^2}+x^2$
$\frac{6x^2+42x+38}{x+6}$
$14x^2y-4xy^2-6x^2y^2$
$\frac{3\pi}{2}-\frac{\pi}{3}$
$x^2+2xb+b^2$
$\cos\left(1.3258\right)$
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