$\frac{a}{2}+b$
$4x^3-24x^2+36x$
$cos\:a\:=cos\:^4\:a-\:sen\:^4\:a$
$\left(7x^10\right)\left(9x^2\right)$
$\sec\left(66.96\right)$
$\left(\frac{5x}{4}-\frac{1}{3}\right)^2$
$7u+2u+10$
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