question: it is recommended by cosmetologists and professional dermatologists, because this biologically active additive has many advantages.
Capitalize this past sentence correctly.
A: It is recommended by cosmetologists and professional dermatologists, because this biologically active additive has many advantages.

question: i also sent you a personal message via email.
Capitalize this past sentence correctly.
A: I also sent you a personal message via email.

question: rotate the piece when working and work from rs the entire time.
Capitalize this past sentence correctly.
A: Rotate the piece when working and work from RS the entire time.