This piece of software is unacceptable. In the table for a+bx alone, there are two errors in the results (twice a factor 1/b^2 instead of 1/b^3), plus one error on one of the buttons (a missing slash), and I did not continue checking anymore; I simply had enough. Obviously the author did not check his software. The entire software gives the impression of an amateur job. The output is very crude. I recommend the tables of integrals to be found in any math handbook for a far better value.

The table also should contain the integral of Log(x), as there is one empty slot, given the author knows this integral. Hint to the author: partial integration: the constant factor 1 is integrated, and Log(x) is differentiated.