$\int\frac{\left(cx\right)}{\left(ax^2+b\right)^2}\:dx$
$y^2-196y+196$
$-x^4+x^2-2x^2+1$
$\frac{x^6}{x^{-2}}$
$\lim_{x\to\frac{\pi}{6}}\left(\frac{\sin\left(x-\frac{\pi}{6}\right)}{\sqrt{3}-2\cos\left(x\right)}\right)$
$\frac{25}{5}-\frac{21}{7}$
$y'+15y=15$
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