$91+91$
$x^2+x-x^8+x^5$
$y'=1+2x+2y+4xy$
$z=\left(\frac{1}{2}+\frac{1}{2}\right)^2$
$\frac{d^{19}}{dx^{19}}\left(e^x\cdot\sin\left(x\right)\right)$
$64g^9-8a^6$
$-5s^2+-s^2+-2s^2$
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