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add+
substrate -
word math
word math subtract
100
4+4+90+1
4+4+90+1=99
100
109-45-7
109-45-7=57
100
eat+ice
eat+ice=6 
100
popcorn-ice
popcorn-ice=4
200
25+9+100+30
25+9+100+30
200
300-90-34
300-90-34=186
200
think+the 
think+the=8
200
cool-eat 
cool-eat=1
300
300+300+99+12
300+300+99+12=711
300
100-89
100-89=21
300
week+there 
week+there=9
300
school-could 
school-could=1
400
678+34+90
678+34+90=802
400
687-9
 687-9=678
400
and+popcorn
and+popcorn=10
400
they-um
they-um=2
500
34+90
34+90=124
500
567-67
567-67=500
500
pole+candy
pole+candy=9
500
were-we
were-we=2