# How do you simplify #(20x^6 - 13x^5) - (-7x^6 + 7x^5 - 20x^3 - 4x^2)#?

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To simplify the expression (20x^6 - 13x^5) - (-7x^6 + 7x^5 - 20x^3 - 4x^2), combine like terms: 20x^6 - 13x^5 + 7x^6 - 7x^5 + 20x^3 + 4x^2 = (20x^6 + 7x^6) - (13x^5 - 7x^5) + 20x^3 + 4x^2 = 27x^6 - 6x^5 + 20x^3 + 4x^2

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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