0, 1,- 1,
0,- 1,
[Reciprocal number and its square phase] The topic is incomplete.
2.(- 1)2n refers to the 2n power?
(- 1)2n+(- 1)2n- 1 = 1+(- 1)= 0
3.|m+ 1| and (n+2)2 are all numbers greater than or equal to 0. If sum is 0, only both can be 0.
m=- 1,n=-2
m3-n2=- 1-4=-5
I hope I can help you ~!