Hi Jean,
What version of SymPy are you using?
This seems to work fine on SymPy master and with the most recent version (1.4):
In [1]: repr(Mul(-1, 2, 5, evaluate=False))
Out[1]: '-2*5'
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Oscar
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Hello everyone,
I am trying to use SymPy for a mathematical projet, where I need
expressions to be evaluated step-by-step.
Until now, I have always used, for example, sympify("2+2", evaluate=False)
and all was fine.
But now I am trying to reconstruct an expression from another object that I
