I'm trying to improve in mathematics. I was practicing differentiation sums today. I could solve the easy ones but the moment i had to solve sums with the same theory/formula but a bit harder, my brain stopped working. I had to ask Yahoo Answers 3 times today to solve 3 problems. I just had to read the answers halfway and I was already like, oh yeah and it just clicked into my head. I'm feeling down because I genuinely like maths and physics but I never did amazing. I never flunked but I never got 90% in my final exams. I'm practicing more and more but these problems and the fact that I make stupid mistakes a lot (forget the minus, don't multiply the numbers) is really discouraging me and makes me think I'm bad at maths.