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katf2314
Distributing each of the signs to the binomials, it first simplifies to  3x^{2} +3 -6x-4 + 3 x^{2} -5x. Then you add all of the like terms and get 6x^{2} -11x -1.
JcAlmighty
The answer is 6x² - 11x - 1

The expression is:
(3x² + 3) - (6x + 4) + (3x² - 5x)

Let's lose parenthesis:
(3x² + 3) - (6x + 4) + (3x² - 5x) = 3x² + 3 - 6x - 4 + 3x² - 5x

Now, rearrange:
3x² + 3 - 6x - 4 + 3x² - 5x = 3x² + 3x² - 6x - 5x + 3 - 4 = 6x² - 11x - 1

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