$45-24-37+85-23+35$
$\frac{4x^2y^3}{2xy^3}$
$\int r^4\left(7-\frac{r^5}{10}\right)^3dx$
$6x<12$
$2y\:dx\:+\:3xdy\:=\:xy^{3\:}\:dy$
$2\cot^2\:=\:\frac{1}{sec+1}-\frac{1}{sec\:-1}$
$x^2-8x+3=11$
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