$\left(2xy+e^y\right)y'+\:y^2+cos\left(x\right)=0$
$\left(x+1\right)\left(x-1\right)\left(x+2\right)x+1$
$x^2-10+90$
$\left|8+\left(-9\right)\right|+\left(12-4\right)$
$4a^2b^4+8ab^2-2$
$1201+9$
$25x^3-30x^2-20x+24$
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