$-5x^2+30x$
$sin\:\frac{\pi\:}{3}+\theta\:-cos\:\frac{\pi\:}{6}+\theta\:$
$x2+5x=0$
$\frac{1}{x^{-3}}$
$\left(y^2-4y+7\right)^2$
$-2+3\cdot2-53-3-5+2-2\cdot3-4$
$x^2-x-1\:\:\:\:\:+\:\:\:\:\:\:\:\:x^2-x-1\:\:\:\:\:$
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