Samsung Galaxy Note 10.1 3G & WiFi User Manual page 56

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Tutorial for handwritten formulas and figures
Write a formula on a single line. If you write a long formula
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or a formula on more than one line, the device will convert
the formula incorrectly.
Unclosed parenthesis or missing figure in the square root
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will temporarily result in incorrect formula conversion.
The formula will be complete when you finish writing the
formula.
Using special features
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