Given $?+?-? = 2$
Then the values of ? can be from 1 to 20.
Then from this we can get there can 3 distinct equations can be formed.
But how can we do that for any number of ?.
I am not getting any idea.
Can someone please help me in this.
2026-04-03 04:17:20.1775189840
Number of valid arithmetic equations
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