$3x^2+4x-9$
$20+90+51e$
$\left(q^{-1}r^0s^{-5}\right)\left(q^{-6}r^{-1}s^{-2}\right)\left(q^0r^{-1}s^5\right)$
$36-132a-121a^2$
$x2\:+x\:\ge\:1\:$
$\left(-15\right)x\left(29\right)$
$x^6+6x^3-16$
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