10th on 12th?derivation intigration on 11th?

we learn the use of newtons 3 laws on class 11th even all over the india (cbsc) it is on class 9 or 10 th class.in class 11th we have to learn about set intrigation derovation on class 11th it'a a very big problem and for it every student fells depressed every day every night,everytime but in class 9th or 10th we just have to fuck arount?no new consept no besic knowladge about derivation intigration.derivation intigration feels like a slow poison it kills us but slowlly..........