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HP 30S Calculator - Order of Operations

The following table addresses the order of operations for the HP 30s scientific calculator. Numbers and operators are entered into the 30s in the same order that they would be entered in traditional arithmetic.
Order
Operation
1st
Expressions inside parentheses
2nd
Conversion of coordinate rotation
3rd
Fractions that are entered before their argument, such as LN, cos
4th
Functions that are entered after their argument, such as x2
5th
square root and exponentiation (^)
6th
Fractions
7th
pi, random numbers, and physical constants
8th
+/-
9th
Implied multiplication preceding functions that are entered before their argument
10th
Combinations (nCr) and permutations (nPr)
11th
Multiplication, other implied multiplication, and division
12th
Addition and subtraction
13th
All other conversions

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