$\lim x\to\pi\left(\frac{\left(sin2x\right)^2}{1-cos2x}\right)$
$\left(5\right)\left(7\right)\left(9\right)$
$\frac{1}{100}\int x^3\cdot e^{-\frac{x}{10}}dx$
$\int\left(\frac{3u-2}{\sqrt{5-4u}}\right)du$
$x-7<-9x+13$
$\left(4a-b^2\right)^2$
$-32x^2-18\cdot x-17=0$
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