Having wrapped up your work on the smaller projects, you are finally able to turn your attention to the project you are most excited about: research! Being one of Casey's projects, the files needed are password protected. Once again, you review the hint that Casey has left as a reminder of the password.
Find an exact solution for
ln(7)+ln(7x2−6)=ln(127)ln7+ln7x2−6=ln127.
If there is no solution, enter NA. If there are multiple solutions, they should be separated by semicolons (e.g. 2;4;62;4;6 or x+1;x−1x+1;x−1).