I tried the same thing, worked for me as well. In fact your approximation is quite a bit more precise than it need to be, you can completely remove the +744 and it still works. On an unrelated note, just saw that Balkan Questions have gone online if anyone's interested. On Fri, May 6, 2011 at 5:46 PM, Adam P. Goucher <apgoucher@gmx.com> wrote:
Today I received a Casio fx-85GT calculator as a present from a couple of my friends. It gives expressions in exact forms as an alternative to the ordinary decimal output. For example, enter:
sqrt(8)
and it will output:
2*sqrt(2)
Of course, I believed that the calculator was performing symbolic manipulation -- very impressive for a handheld scientific calculator!
However, I then decided to test it:
ln(640320^3+744)/sqrt(163)
Instead of displaying the correct answer, 3.14159265..., a prominent image of the Greek letter pi was rendered!
Hmm...
I'm waiting for a version that prints "stop trying to test my symbolic calculation facilities with well-known near-miss identities!"
On this topic, there is this comic:
Sincerely,
Adam P. Goucher