$\frac{dy}{dx}=\ln\left(x-9\right)$

$\left(4xy^3+3y^2+1\right)dx+\left(6x^2y^2+6xy+1\right)dy=0$

$-5x\:+\:9y\:-\:10z\:+\:7x\:-\:5y\:+\:8z$

$\lim_{x\to0}\left(\frac{5sinxcosx-x}{tanx-x}\right)$

$\int2x\left(x^5+5\right)^5dx$

$2+m=-18$

$\lim_{x\to\infty}\left(\frac{3-\frac{2}{y^3}-3y^4}{9y^4-\frac{5}{y^2}-3}\right)$