exam Maths Puzzle Numerical Ability

Add and simplify:

1/x-2 - 4/x^2 + 3/x+2

Multiply and simplify:

x^2-6x+8/3x+9 multiplied by x+3/x^2-4

Divide and simplify:

y2+7y +10/2y-4 divided by y^2-3y-10/y-2

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exam Other Question
2 log base 3 9x= 8 How many ways can the letters A,B,C,D,E, and F be arranged in a row 4 at a time if neither A nor C can be first or third and D cannot be the fourth? Repetition is permitted.