Ive been using Chegg for help in my calculus. Im not sure if its just this book in particular (Calculus: Early Transcendentals 8th ed.), but the questions are not in order, making it extremely inefficient to track or find answers and explanations. PLEASE fix! Otherwise, I love this app. For all the help and tools they offer to help you achieve and exceed in the classroom, its well worth the subscription price. Id recommend to any student, even if youre on the deans list. Its comparable to life insurance for your grades.