pls help with this question ASAP


What equations do u insert in between these numbers to get the answer

a.5 8 3 9 =50


b.12 6 2 10=14


c.4 5 6 10=24


d.7 4 6 9 7= 16


e.4 9 6 2 =52


f.45 5 9 3 7=102



Answer :

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Step-by-step explanation:

a) 5