$3x+\frac{1}{2}<7x+\frac{5}{2}$
$\int sen^47\:x\:dx$
$49x^4y^2-64w^{10}z^{14}$
$\sqrt{5}\cdot\sqrt{x^3}\cdot\sqrt{5}\cdot\sqrt{x^2}$
$8y^2\cdot4x^2\cdot3y$
$\frac{9x^3+6x^2+7}{3x^2}$
$9x-3$
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