exam Maths Puzzle Numerical Ability

I am trying to simplify the following:
(x^2)^5 * x / x^3

I got to this:
x^2.5 / x^3 * x / x^3 = x^10 / x^3 * x / x^3

Now I am stumped.

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exam Other Question
Simplify /8 x^2 y^3 / /4 x^3 y^2. I need your help with this please.
Solve the following system by substitution. If a unique solution does not exist, state whether the system is inconsistent or dependent. 5x - 2y = -5 and y - 5x = 3