$78 - 5 \times 2 ^ { 2 } + 3$
$\left(5y^2\:+\:2y\right)\left(xy\:-\:2y\right)$
$xdx+ydy0$
$6\left(4x+11\right)+2\left(x+8\right)$
$\sqrt[3]{d^4}$
$\lim_{x\to+\infty\:}\frac{\ln\left(1+x^2\right)}{x}$
$\frac{1}{sin}^2\left(x\right)-\frac{cos}{sin}^2\left(x\right)$
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