Add punctuation: Related events taking place at the same time include
A: Related events taking place at the same time include:

Add punctuation: Nobo products are simple and versatile to use giving you the opportunity to decide when and how to use them
A: Nobo products are simple and versatile to use, giving you the opportunity to decide when and how to use them.

Add punctuation: If the sequences ended then the sum could defined in terms of starting with the rightmost digits and expressing the sum in terms of the carry operation
A:
If the sequences ended then the sum could defined in terms of starting with the right-most digits and expressing the sum in terms of the carry operation.