Question: How to Solve Error, (in dsolve/numeric/bvp/convertsys) the ODE system does not contain derivatives of the unknown function f

Please Help,

I am trying to plot some movement equations, but the following error keeps happening:

Error, (in dsolve/numeric/process_input) system must be entered as a set/list of expressions/equations

when I tryed to rewrite the equation the error became:

Can someone help me with those errors?

Here is the code

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