Question

add or remove commas, if necessary, until the sentence has correct punctuation. after scoring the winning goal, gus waters jumped up and down, ran around in circles, and did two backflips.

Explanation:

The sentence already has correct punctuation. The comma after the introductory phrase "After scoring the winning goal" is appropriate, and the commas separating the list of actions "jumped up and down, ran around in circles, and did two backflips" are also correct.

Answer:

The sentence is already punctuated correctly.