$\int\frac{-4}{\left(x+a\right)\left(x+b\right)}dx$
$\frac{d}{dy}\sqrt{x^2+y^2}$
$\lim_{x\to1}\left(x^3-2x^2+x-3\right)$
$\left(4y\:a\:-\:6x\:b\:\right)\left(4y\:a\:+\:6x\:b\:\right)$
$y^2-2y+9$
$21x^2+11x-2=0$
$\left(2y\right)^3$
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