14. Without actually calculating the cubes, find the value of each of the following. Explain with steps
(1) (-12)³ + (7)³ + (5)³
(2) (28)³ + (-15)³ + (-13)³
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1) (-12)³+(7)³+(5)³
=-1728+343+125
=-1260
2) (28)³+(-15)³+(-13)³
= 21952-3375-2197
= 16380
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