/ 1 3\ lim |-3 + ----- + 3*x | x->1+\ 1 - x /
Limit(-3 + 1/(1 - x) + 3*x^3, x, 1)
-oo
= -150.940001760118
/ 1 3\ lim |-3 + ----- + 3*x | x->1-\ 1 - x /
oo
= 150.940791199178
-150.940001760118