$2-3-\left(-3\right)+\left(-4\right)$
$6\left(\left|1\right|\right)$
$196x^2y^4-225z^{12}$
$82x^2-16y^2$
$\int\left(\frac{y+3}{2-x}\right)dy$
$2-85-8$
$1+\cos2x-\cos^2x=\cos^2x$
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