subtract two expression in qlikview

[capriconuser]

i have expression like this 

sum({code={'654','2','131'}>} Amount) 

+

(fabs(sum(distinct{<category={'1005'},code={'2'}>} Amount}

-

fabs(sum(distinct{<category={'1005'},code{'45'}>} Amount )))

+

sum(distinct{<category={'12','34','56','78','90'},code={'56'}>} Amount )

now the second expression which is  

(fabs(sum(distinct{<category={'1005'},code={'2'}>} Amount}

-

fabs(sum(distinct{<category={'1005'},code{'45'}>} Amount )))

i want to modify this only in 1 line like this look category is same but code is different so is this possible to subtract like this ?

(fabs(sum(distinct{<category={'1005'},code={'2'} - code ={'45'}>} Amount} 

any help

[NhanNguyen]

This should work?

(fabs(sum(distinct{<category= {1005,2} - {45}>} Amount} 

[capriconuser]

no.

(fabs(sum(distinct{<category= {1005,2} - {45}>} Amount} 

here category is only 1005 and transaction code are 2 and 45 .. so i  want minus between codes not categories 

[NhanNguyen]

Ok, now I understand. A one-line expression like you proposed is not working since set analysis will exclude data not deduct values. So you must write 2 expressions.