Guys, pleaseeee 🙏🏻. Are these 6 sentences correct?
1- This is very difficult: I don’t get it.
2- This math problem is hard; I don’t understand it.
3- I got confused with the verb to be.
4- Can you help me? I got confused with this.
5- I don’t understand. Why is chemistry so difficult?
6- If someone’s trying to explain you something but you don’t get it at all, then it will be a good opportunity to use that sentence...

See a translation

1- This is very difficult: I don’t get it.
Perfect.

2- This math problem is hard; I don’t understand it.
In America they say "math", in the UK we say "maths". (Source: I did mathematics at University!)
"This maths problem is hard; I don’t understand it."

3- I got confused with the verb to be.
When writing this, you must put it in quotation marks so the reader knows what you are talking about.
"I got confused with the verb 'to be'."

4- Can you help me? I got confused with this.
Your sentence makes sense, but this is more natural.
"Can you help me? This confused me."

5- I don’t understand. Why is chemistry so difficult?
Perfect.

6- If someone’s trying to explain you something but you don’t get it at all, then it will be a good opportunity to use that sentence...
"If someone’s trying to explain something to you, but you don’t get it at all, then it will be a good opportunity to use that sentence..."