exam Maths Puzzle Numerical Ability

PLEASE HELP ME WITH THIS PROBLEM:
FIND THE HORIZONTAL ASYMPTOTE OF THE RATIONAL FUNCTION f(x)= 8x-12 over 4x-2

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exam Other Question

3log x = log125

Here is another one I can not find a practice problem like it.
Thank you in advance for your help! Simplyfy each rational expression:
2x-3/5x+1/6x^2-13x+6/15x^2-7x-2