Question
Subtract the second expression from the first:
$10abc, 2a^2 + 2abc - 4b^2$​​​​​​​

Answer

$10abc - (2a^2 + 2abc - 4b^2 )$
$= 10 abc - 2a^2 - 2abc + 4b^2$
$= 10 abc - 2 abc - 2a^2 + 4b^2$
$= 8abc - 2a^2 + 4b^2$​​​​​​​

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