arithmancer
arithmetician
numerate
cyphering
adder
arithmocratic
arithmetically
reckonmaster
math teacher
mathematics teacher
calculator
probabilist
formulator
algebraist
mathematician
number theorist
expectation
Esperantologist
average
arithmetic average
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estimator
figurer
computer
reckoner
mathmo
numberness
statistician
instituter
summer
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ekistician
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implementer
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tallyman
arithmetic
arithmo-
reverse Polish notation
arithmology