$4x^2+16x^2+9$
$-490+200$
$\int\sin^5\left(\frac{x}{2}\right)\cos\left(\frac{x}{2}\right)dx$
$\left(3a^2.7xy^3\right)^3$
$8\cdot\left(-71\right)$
$\frac{49}{2}x+\frac{14}{3}x$
$x^3\cdot dy+y^2dx$
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