Q: Remove the spaces from the following sentence: I shall also show a physical-mechanical connection between what we call respectively 'gravitational' forces and 'electrical' forces.
A: [Ishallalsoshowaphysical-mechanicalconnectionbetweenwhatwecallrespectively'gravitational'forcesand'electrical'forces.]

Q: Remove the spaces from the following sentence: Thank you to all, for the great newsletter. I really appreciate all the effort and research.
A: [Thankyoutoall,forthegreatnewsletter.Ireallyappreciatealltheeffortandresearch.]

Q: Remove the spaces from the following sentence: He made a practice of writing helpful letters to all who approached him on mathematical matters whether they were professionals, students, amateurs or even cranks.
A: [Hemadeapracticeofwritinghelpfulletterstoallwhoapproachedhimonmathematicalmatterswhethertheywereprofessionals,students,amateursorevencranks.]

Q: Remove the spaces from the following sentence: Today one does not kill out of a desire to kill but, on the contrary, because one believes that it is in the interest of light.
A:
[Todayonedoesnotkilloutofadesiretokillbut,onthecontrary,becauseonebelievesthatitisintheinterestoflight.]