Proofread the following sentence. Insert punctuation as needed.

He complains of pain in his left shoulder, (Mainly upon raising his arm).

Answer:
He complains of pain in his left shoulder (Mainly upon raising his arem).
* the sentence inside the parentheses is a complete sentence of its own, so it is capitalized.

arem = arm

Sra

Yes - arm spelled/typed wrong.

Question: is it correct to leave the comma out after shoulder -
and keep Mainly capitalized.

Thanks and good-nite

Above answer:

Absolutely not!!

He complains of pain in his left shoulder (Mainly upon raising his arem).

The words inside the parentheses are NOT a sentence. There is no subject, and there is no complete verb.

Here's what's correct:
He complains of pain in his left shoulder, mainly upon raising his arm.

Proofread the following sentence. Insert punctuation as needed.

He complains of pain in his left shoulder (mainly upon raising his arm).

Answer:
He complains of pain in his left shoulder (mainly upon raising his arm).