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When you open your ios builtin calc and rotate the iphone you get the scientific calc:

I am trying to use Parenthesis ( ) to write something like:

(2+2)/4 but the parenthesis don't appear!

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up vote 7 down vote accepted

The built-in calculator doesn't offer any visual clues to let you know you've opened a sub-group operation in an expression. The only thing that tips you off is you'll get a sub-result after you close the group show up in the display. For example, enter the following:

5 + ( 3 + 3 )

After you type the opening ( you don't see anything on the display. But when you press the closing ) the display shows you 6 to tip you off to the fact that the 3 + 3 operation was performed.

I prefer the TouchCalc app myself. It will show a small ( in the lower left corner of the display when you open a sub-expression grouping so you know you're actually perserving your order of operations as intended.

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Apple can really negativtely suriprise me – dynamic Feb 28 '12 at 18:02

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