$\left(3x+2\right)\cos\left(x\right)$
$\left(-4\right)-\left(-3\right)-\left(+7\right)-\left(+2\right)-\left(-5\right)$
$14+\left(-1\right)+-31$
$3+7+2g-6g$
$9a^2-b^2c^2$
$\left(-4\:+\:wy^2\right)\left(-4\:-\:wy^2\right)$
$21-12\sqrt{3}x^3$
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