Forward from: Azizakhon Turakhujaeva
a^3+b^3-c^3+3abc=
a+b=c
(a+b)^3-3ab(a+b)-c^3+3abc=
c^3-3abc-c^3+3abc=0
B
a+b=c
(a+b)^3-3ab(a+b)-c^3+3abc=
c^3-3abc-c^3+3abc=0
B