a*b=(3m-4q)(4m+2q)=12m^2+6mq-16mq-8q^2=12*7^2+0-0-8*7^2=49(12-8)=196
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a*b=(3m-4q)(4m+2q)=12m^2+6mq-16mq-8q^2=12*7^2+0-0-8*7^2=49(12-8)=196