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  1. #!/bin/bash
  2. s="( - xi**2 + 2*xi - 1)"
  3. sed 's/( - xi\*\*2 + 2\*xi - 1)/k1/g' <<< "$s"
  4. sed -E 's/\( - xi\*\*2 \+ 2\*xi - 1\)/k1/g' <<< "$s"
Success #stdin #stdout 0.01s 5560KB
comments (?)
stdin 
Standard input is empty
stdout 
k1
k1
https://ideone.com/oYqc6W
language:
Bash (bash 5.0.3)
created:
3 years ago
visibility:
secret

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