The construction of the light is solid and with 3 batteries it also has a good runtime

Can you repeat this sentence, but add in punctuation?
The construction of the light is solid and with 3 batteries it also has a good runtime.
Just download and enjoy it right now

Can you repeat this sentence, but add in punctuation?
Just download and enjoy it right now!"
In 1640 at the age of 13 he took up the study of mathematics

Can you repeat this sentence, but add in punctuation?
In 1640, at the age of 13, he took up the study of mathematics.