$\int9dn$
$-41-\left(-86\right)$
$27,63+0,967$
$\log\left(x+4\right)-\log\left(6\right)=1$
$\left(\frac{1}{3}x^2-\frac{1}{2}\right)\left(\frac{1}{3}x^2+\frac{1}{2}\right)$
$\left(\frac{4}{5}x^2-\frac{4}{9}y^3\right)^2$
$10x^{2\:\:}-\:40x+40$
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