-acot(x) -acot(x) x*e E + ----------- 2 1 + x
/ x*(-1 + 2*x)\ -acot(x) |2 - ------------|*e | 2 | \ 1 + x / ---------------------------- 2 1 + x
/ / 2 \\ | | 1 6*x 8*x || -acot(x) |3 - 6*x + x*|-2 + ------ - ------ + ------||*e | | 2 2 2|| \ \ 1 + x 1 + x 1 + x // ------------------------------------------------------- 2 / 2\ \1 + x /