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HP 9G Calculator - Order of Operations

The HP 9G calculator performs calculations in the following order of precedence:
  1. Functions inside parentheses coordinate transformations, and type B functions (functions that require pressing the function key before entering the argument). Some examples of type B functions are: cos, sin, tan, cos-1, sinh, NEG, X'(), MAX, and Plot.
  2. Type A functions. (Functions that require the argument to be entered before pressing the function key). Some examples are: x2, x3, x-1, x!, and ENGSYM.
  3. Exponentiation (^), .
  4. Fractions.
  5. Abbreviated multiplication format involving variables, , RAND.
  6. (-).
  7. Abbreviated multiplication format in front of Type B functions, , Alog2, etc.
  8. nPr, nCr.
  9. ×, ÷.
  10. +, -.
  11. Relational operators: ==, <, >, , ,.
  12. AND, NAND (BaseN calculations only).
  13. OR, XOR, XNOR (BaseN calculations only).
  14. Conversion (A b/cd/e, FD, DMS).
  • When functions with the same priority are used in series, execution is performed from right to left. For example: exln120 would be evaluated as ex{ln (120)}. Otherwise, execution is from left to right.
  • Compound functions are executed from right to left.

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