$f\left(x\right)=2\left(-3\right)+xf\left(x-3\right)=\frac{50}{\left(-3\right)^2-25}$

$m\left(2a+b\right)+p\left(2a+b\right)$

$\left(x-4\right)y'+y=0$

$\lim_{x\to-\infty}\left(x^6\:+\:2x^9\right)$

$-3x-2=-11$

$\int_{-\infty\:}^{-1}\left(\frac{3}{x^2}\right)dx$

$\int\frac{x^2+1}{\left(x^2+4\right)^2\left(x^2+9x+44\right)}dx$