Solución
−
3
(
t
a
x
+
s
e
n
x
)
−
4
⋅
(
sec
2
x
+
cos
x
)
- 3{\left( {tax + senx} \right)^{ - 4}} \cdot \left( {{{\sec }^2}x + \cos x} \right)
−
3
(
t
a
x
+
se
n
x
)
−
4
⋅
(
sec
2
x
+
cos
x
)