$257^2$
$\frac{1+cotx+cscx}{1+tanx+secx}$
$12\left[14-\left(9-15\right)+6\right]$
$_{\left(7-2+4\right)}-\left(2-5\right)$
$xy\frac{dy}{dx}=1-x^2$
$\csc\left(x+7\pi\right)$
$400a^1+40x^5+1$
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