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By watching the video you can learn how to simplify an expression using the order of operations which shows you an clear example with solution and find more help with similar topics such as Mathematical Order of Operations - http://math.tutorvista.com/number-system/order-of-operations.html

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ScienCalc is a convenient and powerful scientific calculator. ScienCalc calculates mathematical expression. It supports the common arithmetic operations (+, -, *, /) and parentheses. The program contains high-performance arithmetic, trigonometric, hyperbolic and transcendental calculation routines. All the function routines therein map directly to Intel 80387 FPU floating-point machine instructions. Scientific calculator gives students, teachers, scientists and engineers the power to find values for even the most complex equation set. You can build equation set, which can include a wide array of linear and nonlinear models for any application. *Linear equations *Polynomial and rational equations *Nonlinear exponential, logarithmic and power equations *Pre-defined mathematical and physical constants