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2
--------------
✓8+2✓15
4. 8-✓15
------------÷ - ---------
8 + 2✓15. 8 =-✓15
32 - 4✓15. 32. - 4✓15
--------------=. ----------------
8²- ✓15². 64 - 15
32-4✓15
-------------=
49