$5x^2+2x-3=0$
$-\left(4-20\right)+13$
$\left(x^3+4y\right)\cdot\left(x^3-2yx\right)$
$\int\:\:x^8\left(\sqrt{x+2}\right)dx$
$y^8x^2-16y^6$
$1\cdot9a^2$
$m^2=100$
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