stimulates the cells of the immune system that identifies and removes cancerous cells or infected with a virus

Can you repeat this sentence, but add in punctuation?
-stimulates the cells of the immune system that identifies and removes cancerous cells or infected with a virus
The average number of stable isotopes increases with proton number reaching a peak for proton number 50 Tin and declines generally thereafter as shown in the table below

Can you repeat this sentence, but add in punctuation?
The average number of stable isotopes increases with proton number reaching a peak for proton number 50 (Tin) and declines generally thereafter, as shown in the table below.
Paid or not photography I do not remember but even if he paid then again the sum is purely symbolic

Can you repeat this sentence, but add in punctuation?
Paid or not photography - I do not remember, but even if he paid, then again, the sum is purely symbolic.