with ttt as

(select '641177' pk_id,

'886.085.6+886.085.9+886.085.10+886.085.11-886.085.14' right_result

from dual

UNION ALL

SELECT '641178', '886.086.6+886.086.9+886.086.10+886.086.11-886.086.14'

FROM DUAL

UNION ALL

SELECT '265449',

'736.1.1 + 736.4.1 + 736.7.1 - 736.8.1 + 736.9.1 + 736.10.1'

FROM DUAL)

SELECT PK_ID,

RIGHT_RESULT,

V_ITEM,

SUBSTR(RIGHT_RESULT, INSTR(RIGHT_RESULT, V_ITEM) + LENGTH(V_ITEM), 1) V_CALULATOR

FROM (select pk_id,

right_result,

REGEXP_SUBSTR(replace(replace(replace(replace(right_result,

'+',

','),

'-',

','),

'*',

','),

'/',

','),

'[^,]+',

1,

LEVEL) V_ITEM

from ttt

CONNECT BY LEVEL < REGEXP_COUNT(replace(replace(replace(replace(right_result,

'+',

','),

'-',

','),

'*',

','),

'/',

','),

',') + 2

AND PRIOR PK_ID = PK_ID

AND PRIOR DBMS_RANDOM.value IS NOT NULL)