exam Maths Puzzle Numerical Ability

i am having a hard time getting this : (y / y^2 -1) + (y-1 / y +1) - 2y / 1 - y)

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exam Other Question

2X-3/3=3x+2/5 find the equation of the axis of symmetry and the coordinates of the vertex of each quadtratic function
#1. g(x)= -4sqaured +5x+1 , #2. g(x)= (x+5)squared -3 , #3 g(x)= 2x square