book Maths Puzzle Numerical Ability

Simplify the complex fraction:

2/14x over 4/7xy

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book Other Question

Expand using the rules of logarithms.

log (x^2 y^3 Square root z-1)
log a over 3 Square root BC
log (t^2 * 4 Square root tp^3)
Ok this is the instructions:
Find the degree of the polynomial.
Here is the problem:
Arrange the terms of y^4x+y^5x^3-x^2+yx^5 so that the powers of x are in ascending order.
How do i do this?
Thanks in advance!