Solución
−
12
cot
2
(
4
x
+
1
)
⋅
csc
2
(
4
x
+
1
)
- 12{\cot ^2}\left( {4x + 1} \right) \cdot {\csc ^2}\left( {4x + 1} \right)
−
12
cot
2
(
4
x
+
1
)
⋅
csc
2
(
4
x
+
1
)