const regex = new RegExp('(?:AT\\+CIMI|AT\\+CPIN|AT\\+QCCID|AT\\+QSIMSTAT) (?:.+) (\\d\\d)', 'gm')
const str = `6 Network Service Commands .......................................................................................................... 74
6.1. AT+COPS Operator Selection ............................................................................................ 74
6.2. AT+CREG Network Registration ........................................................................................ 76
6.3. AT+CSQ Signal Quality Report .......................................................................................... 78
6.4. AT+CPOL Preferred Operator List ...................................................................................... 79
6.5. AT+COPN Read Operator Names ...................................................................................... 81
6.6. AT+CTZU Automatic Time Zone Update ............................................................................ 81
6.7. AT+CTZR Time Zone Reporting ......................................................................................... 82
6.8. AT+QLTS Obtain the Latest Time Synchronized Through Network .................................... 84
6.9. AT+QNWINFO Query Network Information ........................................................................ 85
6.10. AT+QSPN Display the Name of Registered Network ......................................................... 87`;
const subst = ``;
// The substituted value will be contained in the result variable
const result = str.replace(regex, subst);
console.log('Substitution result: ', result);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions