Add.

(-5x^4+6x^3-43) + (6x^5-x^2+12x+12)

Express the answer in standard form.

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To add expressions, you should take note that you can only combine same terms which means they have the same degree of exponents.

-5x^4 + 6x^3 - 43 + 6x^5 - x^2 + 12x + 12

In this expression, you can only combine the constants because they are the only similar terms:

-5x^4 + 6x^3 + 6x^5 - x^2 + 12x + 12 - 43

-5x^4 + 6x^3 + 6x^5 - x^2 + 12x - 31

The standard form starts with the term with the highest exponent so you just have to arrange the terms:

6x^5 - 5x^4 + 6x^3 - x^2 + 12x + 12