Step |
Hyp |
Ref |
Expression |
1 |
|
pinn |
|
2 |
|
pinn |
|
3 |
|
pinn |
|
4 |
|
nnaass |
|
5 |
1 2 3 4
|
syl3an |
|
6 |
|
addclpi |
|
7 |
|
addpiord |
|
8 |
6 7
|
sylan |
|
9 |
|
addpiord |
|
10 |
9
|
oveq1d |
|
11 |
10
|
adantr |
|
12 |
8 11
|
eqtrd |
|
13 |
12
|
3impa |
|
14 |
|
addclpi |
|
15 |
|
addpiord |
|
16 |
14 15
|
sylan2 |
|
17 |
|
addpiord |
|
18 |
17
|
oveq2d |
|
19 |
18
|
adantl |
|
20 |
16 19
|
eqtrd |
|
21 |
20
|
3impb |
|
22 |
5 13 21
|
3eqtr4d |
|
23 |
|
dmaddpi |
|
24 |
|
0npi |
|
25 |
23 24
|
ndmovass |
|
26 |
22 25
|
pm2.61i |
|