Siplify a (a ^(2) + a +1 ) + 5 and find ...

Siplify `a (a ^(2) + a +1 ) + 5` and find its value for (i) ` a = 0, (ii) a = 1, (iii) a = -1`
(i) Put a =0, we have
(ii) Put `a = 1,` we have
(iii) Put `a = -1, ` we have

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