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Multiplication of polynomials

1.12+5a = 3(6a-9)
2.7+a = 2(2a-16)
3. 6a(a+3)= 2a(3a+5)+16

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  1. 1.12+5a = 3(6a-9)
    12+5a = 18a-27

    do the others the same way

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