5m(r - t) + 4n(r - t)
Added by William A.
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The first part of the expression is "Sm (r _ t)". We don't know what "Sm" means, but we can assume it's some kind of function or operation. We also don't know what "r" and "t" represent, but we can assume they are variables or values that will be used in the Show more…
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