import sys

sys.setrecursionlimit(10**6)
int1 = lambda x: int(x)-1
p2D = lambda x: print(*x, sep="\n")
def II(): return int(sys.stdin.buffer.readline())
def FI(): return float(sys.stdin.buffer.readline())
def MI(): return map(int, sys.stdin.buffer.readline().split())
def MF(): return map(float, sys.stdin.buffer.readline().split())
def MI1(): return map(int1, sys.stdin.buffer.readline().split())
def LI(): return list(map(int, sys.stdin.buffer.readline().split()))
def LI1(): return list(map(int1, sys.stdin.buffer.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def LLI1(rows_number): return [LI1() for _ in range(rows_number)]
def BI(): return sys.stdin.buffer.readline().rstrip()
def SI(): return sys.stdin.buffer.readline().rstrip().decode()
dij = [(0, 1), (-1, 0), (0, -1), (1, 0)]
inf = 10**16
# md = 998244353
md = 10**9+7

n=II()
to=[[] for _ in range(n)]
for _ in range(n-1):
    u,v=MI1()
    to[u].append(v)
    to[v].append(u)

dpf=[0]*n
dpr=[0]*n

def dfs(u=0,pu=-1):
    dpf[u]=1
    for v in to[u]:
        if v==pu:continue
        dfs(v,u)
        dpf[u]+=dpf[v]
dfs()

ans=0
def dfs2(u=0,pu=-1):
    global ans
    s=dpf[u]+dpr[u]-1
    ans=(ans+(s-dpr[u]+1)*(dpr[u]+1))%md
    for v in to[u]:
        if v==pu:continue
        dpr[v]=s-dpf[v]+1
        ans = (ans+(s-dpf[v]+1)*(dpf[v]+1))%md
        dfs2(v,u)
dfs2()

print(ans)