I can help with any basic math problem you have including ones from algebra. I can give you tips on how to do math quickly in your head.
I found that I am very good in the mathematics of Algebra and below. The biggest problem I solved in my head was two 5-digit numbers multiplied by eachother. It took me slightly under 30 minutes. I can do 3 digit numbers in about 1 minute though. Other than that, I am very good at math using paper and calculators too.
I am taking calculus now, but I won't be answering questions of that level.