Added operate(op, left, right) BIF
Added operate(op, left, right) BIF

SimenB/stylus,rstacruz/stylus,Ricardh522/stylus,modulexcite/stylus,trixter5/stylus,jonpacker/stylus,galenvagen/stylus,johnnycopperstone/stylus,stylus/stylus,a-x-/stylus,silvaemota/stylus,HossainKhademian/Stylus,tyv/stylus,jameswomack/stylus,ThiagoGarciaAlves/stylus,cemoulto/stylus,Zagorakiss/stylus,yetone/stylus,Delapouite/stylus,angryrobot/stylus,PeterWangPo/stylus,jangarcia/stylus,peterkinalex/stylus-1,behzad88/stylus,baotingfang/stylus,meteor/stylus