s
h
o
w
s
u
b
s
t
i
t
u
t
i
o
n
u
x
i
n
t
e
g
r
a
n
d
:
x
s
i
n
(
x
)
x
x
x
s
i
n
(
x
)
x
l
o
g
(
x
)
x
l
o
g
(
x
)
x
-
1
x
x
2
s
e
c
(
x
)
l
o
g
(
x
)
-
1
t
a
n
(
x
)
-
1
s
i
n
(
x
)
∫
x
s
i
n
(
x
)
d
x