It works, I made a mistake with sympy version On Mar 26, 4:46 pm, Yuri Karadzhov <[email protected]> wrote: > > This actually can be solved with SymPy already: > > > In [1]: var('t') > > Out[1]: t > > > In [2]: (f(x)+2*x+sin(y+cos(t))).atoms(Function) > > Out[2]: set(cos(t), f(x), sin(y + cos(t))) > > In [97]: var('t') > Out[97]: t > > In [98]: (f(x)+2*x+sin(y+cos(t))).atoms(Function) > Out[98]: set(f(x), sin(y + cos(t))) > > So it can't
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