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import re
 
s = '\\(2 \\, e^{\\left(2 \\, x\\right)} \\sin\\left(2 \\, x\\right) + 2 \\, e^{\\left(2 \\, x\\right)} \\cos\\left(2 \\, x\\right)\\)'
 
print(re.sub(r'e\^{\\left\((.*?)\\right\)}', r'e^{\1}', s))
 
try:
   re.sub(r'(?Pe\^{\\left()(?P.*)(?P\\right)})','e\^{\\g}',s)
except Exception as e:
   print(e)
 
print(re.sub(r'e\^{\\left\((.*)\\right\)}', r'e^{\1}',s))
 
 

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• # 1:   hide show   clone   input   473 days 8 hours ago    Success

  result: Success     time: 0.02s    memory: 5864 kB     returned value: 0

  input: no
  output:

  \(2 \, e^{2 \, x} \sin\left(2 \, x\right) + 2 \, e^{2 \, x} \cos\left(2 \, x\right)\)
  unknown specifier: ?Pe
  \(2 \, e^{2 \, x\right)} \sin\left(2 \, x\right) + 2 \, e^{\left(2 \, x} \cos\left(2 \, x\right)\)