$sin\left(2x\right)+2sin\left(\frac{x}{2}\right)cos\left(\frac{x}{2}\right)$
$\frac{\left(-4\right)^7}{\left(-4\right)^3}$
$\int\frac{x+1}{x^3-x^2-2x}dx$
$\left(x+18\right)^2\:$
$\left(x+y\right)^2=x^2$
$\infty^3$
$\left(18x^7y^{-4}z\right)^{-2}$
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