(8--3)(8^2+8*-3+-3^2)
but I think you may really have meant
(8--3)(8^2+8*-3+ (-3)^2)
=(8+3) * (64 +(8*-3) + (-3*-3))
=11 * (64 + -24 + +9)
=11* (64-24+9)
=11*49
=539
If you really did mean
(8--3)(8^2+8*-3+-3^2) then it will be
= 11*(64-24-9)
= 11*31
= 341
