$2\cos2x-\sin x=-1$
$\left(\frac{x^3}{y^{-2}}\right)^{-3}$
$x^2+4x+25$
$\frac{d}{dx}3xsinx-3tan^2x$
$\frac{\left(a-m\right)}{\left(a-m\right)}$
$x^2\frac{2}{9}x+n$
$\int x\left(x^2-9\right)^3dx$
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