open tactic

example : (1030912003002020:int) ≠ 1021992923928 :=
by comp_val

example : -(1030912003002020:int) ≠ 1021992923928 :=
by comp_val

example : (1030912003002020:int) ≠ -1021992923928 :=
by comp_val

example : -(1030912003002020:int) ≠ 0 :=
by comp_val

example : (0:int) ≠ 1021992923928 :=
by comp_val