This video contains information on Casio fx-991 ex classwiz tricks that will teach you how to solve calculus problems easily and fast with the casio fx-991 ex classwiz scientific calculator which include: Function, Limit, differentiation or derivatives, and integration. For limit, you will see videos on how to solve limit tending to a real number together with limit and continuity with the casio fx-991 ex classwiz scientific calculator. For the derivative or differentiation, you will see videos on how to solve first derivative, second derivative and third derivative with the casio fx-991 ex classwiz scientific calculator, and lastly for the integration, you will see videos on how to solve definite integration, indefinite integration, and application of integration with the Casio fx-991 ex classwiz scientific calculator.