acos(x + 3)
d --(acos(x + 3)) dx
-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) /