$9^{3}+(-3)^{3}-6^{3}=?$
(a) 432(b) 270(c) 486(d) 540
$9^{3}+(-3)^{3}-6^{3}=(729)+(-27)-216$
$=729-27-216$
$=729-(27+216)$
$=729-243$
$=486$
$\therefore 9^{3}+(-3)^{3}-6^{3}=486$
Hence, the correct option is (c).
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