HP 10BII Owner's Manual page 44

To delay the division until you've subtracted 12 from 85, use parentheses.
Closing parentheses at the end of the expression can be omitted. For
example, entering "25 + (3 X (9 + 12 =" is equivalent to "25 + (3 X (9 +
12) =".
Ge 3.70 Multiplies the result by 9.
44 3:Number Storage and Arithmetic