$-30x^2+150x\:+4500\ge0$
$\left(x-4\right)^2-\left(x+2\right)^2+18xa$
$4w\sqrt[3]{2w^2}$
$\int\frac{18}{x^2-9}dx$
$55-x<25$
$\left(x^4y^2-5xy\right)\left(2xy-4x\right)$
$\sin\left(x\right)\cos x=-\frac{1}{2}$
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