Step-by-step explanation:
1. There is a comma between most and is, which is not correct. Remove the comma. The subject that intimidate me the most is calculus.
2. You have to add a semicolon after 'project' I could not help Justine with her project; I had just begun a new job.
3. Add a comma after Massachusetts. As we passed through Springfield, Massachusetts, we stopped at the Basketball Hall of Fame.
4. Remove the comma between doughnut and is. The last doughnut is Jim's.
5. Remove the comma. I knew immediately what the alarm meant.
6. Add commas. We will be discussing my favorite poem, Leaves of Grass, next semester.
7. You have to Add commas. I would like to thank God, my parents, and Ayn Rand.
8.Add a comma after the word 'food' and remove the comma that is after seasoning. I find that a little fear is the best seasoning for my food, so I often sneak up on my husband while he cooks and frighten him.
hope this helps