$x^2+18x-4=0$
$\left(x-6\right)\left(x-9\right)-\left(x-7\right)^2$
$7\:csc\:\left(x\right)-3=11$
$x-8\leq -14$
$5\:.\:1^2\:.\:2^3.3$
$\sqrt{3}^{20}$
$\frac{dy}{dx}=\frac{\left(y+x+\frac{y^2}{x}\right)}{x}$
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