$500-5y-y^2>220$
$=\frac{1}{\sec x^2}$
$\ln\left(9x+7\right)-\ln\left(x\right)=\ln\left(10\right)$
$5\left(2m-1\right)+5m-95$
$-2\::\:-3$
$\int\frac{x}{\sqrt{2-7x}}dx$
$2\cos x+1=0$
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