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(\partial^2)/(\partial x^2)(e^{6x}cos(2(x+y)))
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∂
2
∂
x
2
(
e
6
x
cos
(
2
(
x
+
y
)
)
)
=
3
2
e
6
x
cos
(
2
(
x
+
y
)
)
−
2
4
e
6
x
sin
(
2
(
x
+
y
)
)
Show Steps
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∂
2
∂
x
2
(
e
6
x
cos
(
2
(
x
+
y
)
)
)
=
3
2
e
6
x
cos
(
2
(
x
+
y
)
)
−
2
4
e
6
x
sin
(
2
(
x
+
y
)
)
steps
∂
2
∂
x
2
(
e
6
x
cos
(
2
(
x
+
y
)
)
)
show steps
∂
∂
x
(
e
6
x
cos
(
2
(
x
+
y
)
)
)
=
6
e
6
x
cos
(
2
(
x
+
y
)
)
−
2
e
6
x
sin
(
2
(
x
+
y
)
)
=
∂
∂
x
(
6
e
6
x
cos
(
2
(
x
+
y
)
)
−
2
e
6
x
sin
(
2
(
x
+
y
)
)
)
show steps
∂
∂
x
(
6
e
6
x
cos
(
2
(
x
+
y
)
)
−
2
e
6
x
sin
(
2
(
x
+
y
)
)
)
=
3
2
e
6
x
cos
(
2
(
x
+
y
)
)
−
2
4
e
6
x
sin
(
2
(
x
+
y
)
)
=
3
2
e
6
x
cos
(
2
(
x
+
y
)
)
−
2
4
e
6
x
sin
(
2
(
x
+
y
)
)
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