$x^2-x-20\ge0$
$\int\:\frac{x^5-4x^2-3}{x}dx$
$3\cos\left(x+30'\right)=\:2.121$
$\int\left(\ln\left(y\right)\right)\cdot y^{\frac{-1}{2}}dy$
$y=\sqrt{x}^3+4$
$\frac{5\cdot\:\:0.97611}{2\pi}$
$\frac{x^2-3x+2}{2}$
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