exam Maths Puzzle Numerical Ability

Please help me find the Hole and vertical asymptotes for the following:

x+2/x^2+6x+9 - 5/x^-9

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exam Other Question
I am stuck on correct answer for:

square root of 48 - sq. root of 12 =


I am not using a specific book. I am just practicing...
 Please help me compute:

f(x)=25-7x g(x)=13 h(x)= x^2 +22x

g(f(x))

Thanks