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derivative of x*(-5-5x)/(7x+5)
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d
dx
(
x
−
5
−
5
x
7
x
+
5
)
=
−
3
5
x
2
−
5
0
x
−
2
5
(
7
x
+
5
)
2
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d
dx
(
x
−
5
−
5
x
7
x
+
5
)
=
−
3
5
x
2
−
5
0
x
−
2
5
(
7
x
+
5
)
2
steps
d
dx
(
x
−
5
−
5
x
7
x
+
5
)
Apply
the
Product
Rule
:
(
f
·
g
)
′
=
f
′
·
g
+
f
·
g
′
f
=
x
,
g
=
−
5
−
5
x
7
x
+
5
=
dx
dx
−
5
−
5
x
7
x
+
5
+
d
dx
(
−
5
−
5
x
7
x
+
5
)
x
show steps
dx
dx
=
1
show steps
d
dx
(
−
5
−
5
x
7
x
+
5
)
=
1
0
(
7
x
+
5
)
2
=
1
·
−
5
−
5
x
7
x
+
5
+
1
0
(
7
x
+
5
)
2
x
show steps
Simplify
1
·
−
5
−
5
x
7
x
+
5
+
1
0
(
7
x
+
5
)
2
x
:
−
3
5
x
2
−
5
0
x
−
2
5
(
7
x
+
5
)
2
=
−
3
5
x
2
−
5
0
x
−
2
5
(
7
x
+
5
)
2
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