/ x \ lim atan|-----| x->0+ \1 + x/
Limit(atan(x/(1 + x)), x, 0)
0
= 3.18072777584888e-29
/ x \ lim atan|-----| x->0- \1 + x/
= -1.94290203046502e-28
3.18072777584888e-29