$\left(3y\:+\:2\right)\:-\:\left(4y\:-\:4\right)$
$-0,3-0,7$
$2ab-5ab+4ab-6ab$
$\int_0^{\infty}\left(\frac{1}{\sqrt{x}}\right)dx$
$\left(3m-5n\right)^3$
$20^2+18$
$2yxy$
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