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Find (x^3-12*x^2-42)-(x^2+x-3)

Solution:
Your problem `->` (x^3-12*x^2-42)-(x^2+x-3)


(x3-12x2-42) - (x2+x-3)
= x3 - 12x2 - 42 - x2 - x + 3
= x3 - 12x2 - x2 - x - 42 + 3
= x3 - 13x2 - x - 39

OR
```x^3``-``12x^2``+``0x``-``42`
-```x^2``+``x``-`+`3`

```x^3``-``13x^2``-``x``-``39`







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