The number of items in the set $\displaystyle A$ is $40$; in the set $B\displaystyle is $32; in the set $\displaystyle C$ is $50$; in both $A$\displaystyle and$B$\displaystyle is$4$, in both $A$\displaystyle and$C$\displaystyle is$5$; in both $B$\displaystyle and$C$\displaystyle is$7$ in all the sets $2$. How many are in at least one of the set?