$-10a+-5a^2+-9a^2+-6a$
$\sqrt{2+3}\sqrt{5-4}\sqrt{2}$
$x5\:-\:x^2\:para\:x\:$
$20a^2-3a-2$
$1.37+10.5-11.8+35.7$
$\frac{2}{3}x=8$
$\left(\frac{2a^4}{3c^5}\right)^2$
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