How can I solve two 2nd order differential equations related to LINE OF SIGHT STABILIZATION PLATFORM AT 2 degrees of freedom.

I am solving two 2nd order differential equations, since equatons are complex I need some tips and devise me any easy and powertool tool of MATLAB for this, equations are related to LINE OF SIGHT STABILIZATION PLATFORM AT 2 degrees of freedom

[Mischa Kim]

Hello Muhammad, could you please post the DE and any other requirements you have?

[Muhammad Talha]

Hi Mischa,thanks for your comment. Yes, I am attaching two equations which I am solving. I am actually doing it by SIMULINK and have modeled almost both equations but few terms in 2nd equation also have its expression, which is making SIMULINK model quite complex. I am getting confused if I am right or wrong. can you tell me exact procedure?