$59,7-0,446$
$\int cos2x\:cos7x\:dx$
$\frac{\sin^2\left(x\right)}{1-\cos^2\left(x\right)}=1$
$x^2-3x^2y$
$\left(\frac{2x^3}{3x}\right)$
$x-7\le8$
$\left(-3x^3+2x^2-5x+9\right)+\left(-x^3+2x^2-5x-6\right)$
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