I have a system of ODE that I need to get an exact solution to. How can I do this using Maple? I tried doing it but error pops out.

Thanks

Pls what is the maple code for the fourth order Runge-kutta method for five systems of ODE of several variables?

Pls how can I label my vertical axis in such a way that the label will be written vertically e.g "proportions of Susceptible"

Please is it possible to increase the 1000000 limit of output? I tried doing some computation in form of power series for S₁₀ but I got the message "1000000 limit of output exceeced". How can I resolve this?

I assigned the greek alphabet  in Maple but it displayed an error message since it is already a known constant 3.142. Please how can I assign pi to 0.45 in Maple ?