Well, why don't we test it!
3+5(4^2+6)*12/4-8 = 325
Let's use pemdas to solve it ourselves.
4*4 is 16.
3+5(16+6)*12/4-8=325
3+5(22)*12/4-8=325
3+110*12/4-8=325
110*12 is 1320
3+1320/4-8=325
3+330-8=325
333-8=325
325=325
So yes, this calculator uses PEMDAS.