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Problem Replacing part of NonCommutativeMultiply expresions
Dear all, I'm working with a huge amount (2000) of terms of this tipe: g**a**p**r**e**r**e But a lot of them are cero. The problem is that i'm not able to set r**e**r**e->0 in such expresions. If I do g**a**p**r**e**r**e/.r**e**r**e->0 nothing happens. Do you have some idea? Thanks a lot!