exam Maths Puzzle Numerical Ability

Please help!

(y^2-36/y^2-4) X (y^2+6y+8)/(y^2-2y-24)

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exam Other Question

Evaluate 2m-5n/n+3p

if m = -2, n = 4, and p = -1.
solve and check:

SQRT of x-1 =x-3