Solve for: lim x> 0- ((x+deltax)^2+x+deltax-(x^2+x))/del tax

2(x + delta x) = 2x + 2 delta x
so on top you have 2x + 2 delta x - 2x
which is 2 delta x
the delta x cancels out and you are left with just 2

so the limit is 2

Uneed to add them up 27+18+23=68