This is in fact a desperate feedback. I mean that, because so far I have been following the tutorial even with some inaccurate direction of the Tutorial.
This time, I am totally bind, it seems. I don't find the sqrt icon mentioned in To type a square root, just click on the button on section 4.4.2. Just as a reminder, I am working on the MacBoor Pro Model Name: MacBook Pro Model Identifier: MacBookPro9,2 Processor Name: Intel Core i5 Processor Speed: 2.5 GHz Number of Processors: 1 Total Number of Cores: 2 L2 Cache (per Core): 256 KB L3 Cache: 3 MB Memory: 4 GB Boot ROM Version: MBP91.00D3.B09 SMC Version (system): 2.2f44 Serial Number (system): C1MMC1H8DTY3 Hardware UUID: 1AE7233B-50C5-5DD9-A7E5-B2E9904907AF Sudden Motion Sensor: State: Enabled
