I have a huge equation f(a,b,c,d,e) that I need to express as a function of one of the variables, a(f,b,c,d,e)
Is there any matlab function that can perform this operation?
The Symbolic toolbox in MATLAB could help. You might need the extended toolbox to get at the full Maple functions you might need. you might have to help MATLAB along. But you could always just try to use the solve function first and see what happens.