Is this plus sign should be an "or" connective?

Anyway, the second question is:

2) 1.L(a,b)&L(b,c)

2. L(a,b)&L(b,a)

3.ExEyAz(~L(x,y)&~L(y,x)&((L(z,x)vL(x,z)v(~L(z,x)& ~L(x,z)))&(L(z,y)vL(y,z)v(~L(z,y)&~L(y,z)))

the three was a bit long, but I hope you got it.