+
T
3
Q
3
Expression
s
: Addition 4/4
22
/69
Q
1
T
1
Expression
Summary
:
E
Expression
+
Q
2
T
2
Expression
Q
n
e
+
+
…
T
2
.
s
Q
2
.i
Q
2
.s
Q
n
.i
Q
n
.s
T
1
.
s
Q
1
.i
Q
1
.s
E.s
T
3
.
s
…
…