$\left(2xy^2-18\right)dx+\left(2x^2y+28\right)dy=0$
$2y+5y-8y$
$\frac{2x}{x-1}+\frac{5}{x-9}=\frac{2}{x^2-10x+9}$
$\int-2x^{-4}\ln\left(x\right)dx$
$\int\cos\left(\frac{\pi}{w}\right)\cdot n\cdot tdt$
$\left(-5.67\right)\cdot\left(8.9\right)$
$5x=4x+10$
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