The denominators of the given numbers are 10, 16, 18,16.

The LCM of 10, 16, 18,16 will be ( 2 x 5 x 2 x 2 x 2 x 3 x 3 ) = 720,
 
Now, the expression will be ( 72 + 90 + 120 + 225 )/720 = 507/720,
 
Hence, the final sum will be 507/720.
 
The results will always be same regardless of the arrangement of the fractions.