Comma help with different types of clauses!?

Question

We all have good days, but at some point, we all go through hard times. 

We all have good days, but, at somepoint, we all go through hard times.    are both of these sentances gramatically correct? 

 

I did good in algebra, so mostlikely, i will also do good in precalculus. 

I did good in algebra, so, mostlikely, i will also do good in precalculus.    Are both of these sentances gramatically correct? 

Answer 1

First one is fine, second one incorrect.

 

In the algebra sentences, it's "did well" instead of "did good." And "most likely" should be two words.

 

I did well in algebra, so I will most likely also do well in precalculus.