$\left(x^2+y^2-4x+3y-6\right)-\left(-4x+6y^2+2x^2-y-5\right)$
$x^2-6x=27$
$\int_1^{\infty}\left(\frac{1}{\sqrt{3x-1}}\right)dx$
$18-4\:.3$
$9\:-\:\left(4+8\right)\:+\:\left(-15\right)$
$-\frac{5}{2}\cdot\frac{2}{5}$
$\lim_{x\to\infty}\left(\csc\left(x\right)\right)$
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