To verify the identity (a)3 + (b)3​

Dear student
Your question is not clear and appears to be incomplete. However I am stating the identity which is as follows.

${\mathrm{a}}^3+{\mathrm{b}}^3=\left(\mathrm{a}+\mathrm{b}\right)\left({\mathrm{a}}^2-\mathrm{ab}+{\mathrm{b}}^2\right)$
Regards