best software package to numerically solve high order nonlinear ODE boundary value problem

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I need to numerically solve a 4th and 5th order nonlinear ODE BVP and I was hoping I could get some advice on the best software package to solve these types of problems. I've used MATLABS bvp4c for the 4th order equation and I'm not too confident in the solutions, I am hoping to try another method. Any advice will be helpful! Thanks!