Melody: 1234smile: y=-1^2+2(1)+3
-(1^2)+2(1)+3 = 4 This is the most acceptable interpretation is brackets are not used.
It is unfortunate that the scientific calculator on this site gives -1^2 as +1 (though it does show as (-1)
2=4 after you press the equals). Proper scientific calculators should obey the rule that raising to a power takes precedence over a minus. Without this we have the potentially confusing situation that -1^2 gives 1 and that 0-1^2 gives -1.