Results
Definition of subtract:
Synonyms:
withhold, determine, clear, recoup, dislodge, prove, add up, reckon, deduct, estimate, remove, take time off, compute, set off, lift off, set out, project, sweep away, weed out, assess, calculate, knock off, infer, flush out, take away, start out, count, derive, deduce, depart, get out, get off the ground, take off, increase, rebate, take, start, extract, part, abate, set forth.
Usage examples:

If we were to subtract from the sum of the intelligence of an animal that which it owes to nature or inherited knowledge, the amount left, representing its own power of thought, would be very small.
 "Ways of Nature", John Burroughs. 
You want to put yours down like that, then add 'em up and subtract it from what you receive.
 "The Road to Understanding", Eleanor H. Porter. 
When ye come t' multiply love by experience, an' subtract vanity an' add peace, an' square the remainder, an' then divide by the number o' days in thy life it is a pretty problem, an' the result may be much or little, an' ye reach it He paused a moment, thoughtfully puffing the smoke.
 "Darrel of the Blessed Isles", Irving Bacheller.