(-) precedence

[jhallen]

All AOS, RPN and RPL calculators: 2 (+/-) x^2 gives 4.

HP-33s in algebraic mode: 2 (+/-) x^2 gives 4. This calculator is interesting- entry is like AOS, but it displays the entered expression in EOS format and delays the result until you press enter (on a classic AOS calculator, after typing "2 * 3 *" you would have "6 *", but on HP-33s you have "2*3*", but otherwise it's like AOS). On HP-33s, you can't edit the entered expression.

TI-68 and TI Galaxy 67 (EOS): (-) 2 x^2 gives 4. These are the only EOS ones I know of that do it correctly (maybe some lower end ones in this series are also good). Are there any others?

All other EOS calculators (Casios, modern TIs, including HP-35s in algebraic mode): (-) 2 x^2 gives -4. (on HP-35s, you have to use x^y to see this since x^2 generates SQ()).

HP-Prime: 2 (+/-) x^2 gives -4! Crazy!