$125+\left(-220\right)-\left(-120\right)$
$\frac{3x}{2+32x^4}$
$2\cdot8-10$
$\:3w\:+\:6\:-2w\:-4\:+\:w$
$\frac{2}{6}\cdot0.3$
$4\cos\left(x\right)-\sqrt{2}=\sqrt{2}$
$9x^2-6x=0$
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