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 In (7) + In (7x2 -2) = In (155). If there is no solution, enter NA. If there are multiple solutions, they should be separated by semicolons (e.g. 2; 4; 6 or r + 1; z - 1)