- B * ( - A - 6A^2B + 4B ) / ( - 2B ) = ( - A - 6A^2B + 4B) : 2 =
= - 0.5A - 3A^2B + 2B
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- A^2B^2 * ( - B + 3A^4 ) / 4A^2 B^2 ) = ( B - 3A^4) : 4 =
= 0.25B - 0.75A^4
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