
PASS testing background-position: calc(2px + 3px) calc(4px + 5px)
PASS testing background-position: calc(18px - 7px) calc(19px - 7px)
PASS testing background-position: calc(4 * 5px) calc(6px * 4)
PASS testing background-position: calc(100px / 4) calc(119px / 7)
PASS testing background-position: calc(6px + 21%) calc(7em + 22%)
PASS testing background-position: calc(-8px + 23%) calc(-9em + 24%)