I made a calculator map for Wc3. It had advanced functions. It hade a full feature vision and units that looked like #'s and when u clicked them it added them. But in sc its only add subtract divide multiply. It uses death counts Im not too sure about multiplying and dividing in starcraft. Its like player clicks 1 add 1 deathcount ect. or clicks minus(switches unswitch 1,3,4 switch 2 ect.) then click 1 subtract 1 deathcount very simple.