Calculus Tools 0.8.5

Redesigned methods for saving functions - I felt that the old method was sort of cumbersome and not entire useful. From now on all functions will be saved in the graph functions database. This also allows the functions in the graph to be saved across different sessions. The function list will now allow you to leave invalid functions saved in it, but they will not be graphed.

Surface area is now able to be found for functions of 2 variables. This, like the double integral (which uses the same method), can sometimes be rather slow.

Fixed bug in integral not adding a function.

Fixed bug in F3 being invalid turned F1 red.

Made update button wider in functions.

Some internal improvements to make things run more efficiently and reduce file size.