acos(5*x + 4)
-5 ------------------- ________________ / 2 \/ 1 - (5*x + 4)
-25*(4 + 5*x) ------------------- 3/2 / 2\ \1 - (4 + 5*x) /
/ 2 \ | 3*(4 + 5*x) | -125*|1 + --------------| | 2| \ 1 - (4 + 5*x) / ------------------------- 3/2 / 2\ \1 - (4 + 5*x) /