acos(x + 3)
-1 ----------------- ______________ / 2 \/ 1 - (x + 3)
-(3 + x) ----------------- 3/2 / 2\ \1 - (3 + x) /
/ 2 \ | 3*(3 + x) | -|1 + ------------| | 2| \ 1 - (3 + x) / -------------------- 3/2 / 2\ \1 - (3 + x) /