Question

a3
$a3 - b3 \div a - b$

Answer 1

${a}^{3} - {b}^{3} \div a - b \\ = \frac{(a - b)( {a}^{2} + ab + {b}^{2}) }{(a - b)} \\ = ( {a}^{2} + ab + {b}^{2} )$
So... That's the answer