program mn;
uses crt;
var pr:array[1..100]of integer;
i,n,k,zn,s:integer;
BEGIN
ClrScr;
Write('N:');
readln(zn);
k:=zn*zn*zn;
for i:=1 to zn-1 do
s:=s+i;
pr[1]:=1;
for i:=2 to s+zn do
pr[i]:=pr[i-1]+2;
for i:=s+1 to s+zn-1 do
write(pr[i],'+');
write(pr[s+zn],'=',k);
readln;
END.