$-37+-7+-11+-18$
$\frac{dy}{dx}\sin^2x=-e^y\cos$
$\cot\left(y\right)+\frac{1}{\cot\left(y\right)}$
$-9r\:-\:10\:+\:4r\:+\:3.5$
$r^5-r^4-2r^3+2r^2+r-1$
$3\cdot\left(\frac{1}{2}a+b\right)-3b$
$7+9c+5$
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