The best way to know what the icons are is to have the Context Help window open (Help -> Show Context Help). This will display a small window that will update as you move the cursor over VIs and functions, telling you what they are. If they are LabVIEW VIs/functions there will also be a link to the detailed help.
The VIs on the outside of the loop are two Sine Pattern VIs and the other is an Outer Product VI (linear algebra). The stuff inside is a couple of property nodes to get the position of the cursors. The mathematical functions should be obvious. Then you have a couple of Ramp Pattern VIs. Not sure what's inside the for loop. That might be a custom VI. See what the Context Help tells you.
If you have not already done so, I would recommend taking some tutorials. To learn more about LabVIEW it is recommended that you go through the introduction material, tutorial(s), and other material in the NI Developer Zone's Learning Center which provides links to other materials and other tutorials. There are also several Technical Resources. You can also take the online courses for free.
