These combinations are as per the guidelines provided in section 6.3.1.2 of IS 1893 ( Part 1 ) : 2002 specifications and appear to be correct. Just ensure that you include the cases with negative signs for the EL as well. For example include
1.2( DL+LL-ELX)
1.2( DL+LL-ELZ)
1.5(DL-ELX)
1.5(DL-ELZ)
.9DL-1.5ELX
.9DL-1.5ELZ
1.2( DL+LL-ELX)
1.2( DL+LL-ELZ)
1.5(DL-ELX)
1.5(DL-ELZ)
.9DL-1.5ELX
.9DL-1.5ELZ