## Elementary Technical Mathematics

$5x^3+13x^2-8x+7$
We simplify by removing the parentheses and then add the like terms as follows: $$(5x^3 - 11x - 1) + (11x^2 + 3) + (3x + 7) + (2x^2 - 2)\\ =5x^3 - 11x - 1 + 11x^2 + 3 + 3x + 7 + 2x^2 - 2\\ =5x^3+13x^2-8x+7 .$$
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