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1.

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3.

3.1 Collecting like terms. - 0 / 28
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3.2 Expanding the Brackets - 0 / 22
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4.

4.1 - 0 / 12
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4.2 Moving the negative sign - 0 / 16
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5.

5.1 Multiplication of powers with the identical bases - 0 / 20
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5.2 Division of powers with identical bases - 0 / 33
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6.

6.1 - 0 / 17
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8.1 - 0 / 15
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15.1 - 0 / 17
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17.1 - 0 / 9
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18.

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20.

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20.16 Combining fractions - 0 / 8
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20.23 Multiplication of powers with the identical bases - 0 / 6
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20.24 Division of powers with identical bases - 0 / 7
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21.

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21.1 Factorization - 0 / 8
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21.2 Collecting like terms. - 0 / 10
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22.

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24.1 - 0 / 14
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26.1 - 0 / 9
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