Click Crt + Evaluate to open the ouput in a new window.
The solution are given as an formated table, you can save it as usual (ej.: pick in the table with your mouse and paste it into a file -ej.: MS EXCEL- for later uses).
Rodríguez-Díaz Juan M. ; Sánchez-León Guillermo; “Efficient parameter estimation in multiresponse models measuring radioactivity retention” Radiation and Environmental Biophysics 2019. (https://doi.org/10.1007/s00411-019-00780-7).