Simplify
(a-b) ^3-(a+b)^3
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simply aaply identities
{a³-b³-3a²b+3ab²} +{a³+b³+3a²b+3ab²}
2a³+6ab²
is the answer
identities shouls be applied as per the method
{a³-b³-3a²b+3ab²} +{a³+b³+3a²b+3ab²}
2a³+6ab²
is the required answer