#1 求教
Simplify the following expression
細字係次方
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Q1 ( 1/6x - 4/3y )*( -12x - 3/7y )
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Q2 ( x[size=1]2[/size] + 1 )*( 2x[size=1]2[/size] + 3xy - 1 )
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Q3 ( 2a - 3b )* ..

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