book Maths Puzzle Numerical Ability

Expand using properties of logarithms:
log (xy^2)
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(Y)

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book Other Question

identify the number of terms in each algebraic expressions
1.3xcubed 4
2.-42+x
3.xsquared 2+2xy+y squared 2
4.x+1
5.(m+n+p)squared 2
6.(a+b)
7.(x-y)(x+y)
8.4m-5n+3p+21
9.2
is 3x+y^2=7 a linear equation?
yes or no? and why?
thanks a lot for your help!