Yes, of course it support Latex.
PS I don't understand what you say since I have never learn RK4 and Euler method you mentioned.
Is RK4 strictly a better approximation than the Euler method? I'm writing the code for a program comparing the two on a particular ODE but I'm finding that the Euler gives the better results. I'm pretty sure my code is right (I can post this later if needs be) so I'm a little confused as I'm certain RK4 should be absolutely better.
PS Also, does this forum support LaTex?
For a fixed step size RK4 should never be worse than Euler with the same step size. Excepting when there are discontinuities or other non-polynomial like behaviours in the equation.