COMPOSITE FUNCTION CALCULATOR
On the sidebar to the right is a composite function calculator I edited using Wolfram Alpha.
Just input the two functions f(x) and g(x) you want to compose as fg(x). Use the hatch symbol # as the variable instead of x. The calculator will display the simplified version of the answer, plus other alternative simplified versions if they exist.
I hope this will help in checking your answers for questions regarding determining the composite function fg. If you want to find gf instead, just input the two functions the other way round.
Thank you for using the calculator, and any feedback is very much welcome!