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7 3 x 4

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-7 ( 3 X -4)

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Answer to a math question -7 ( 3 X -4)

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$-7 \times 3x-7 \times \left( -4 \right)$

$-21x-7 \times \left( -4 \right)$

$-21x+28$

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(3b)⋅(5b^2)⋅(6b^3)