book Maths Puzzle Numerical Ability

Please help me find the GCF of (6y2-3y)(y+7).

I am not sure if I did this right, the answer I come up with is
y(6y-3)(y+7)
y is the GCF

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book Other Question
Can i Have a answere for the following two questions, thanks very much


1) 0.04^log(base 0.2)3

2) 10^1+ln5 What percent of 4,292 is 5,365?