exam Maths Puzzle Numerical Ability

can u help me with 2(44+-9999)=6n

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exam Other Question

Please help me reduce this to lowest terms:

5x/5x-y + 2y^2/25x^2-y^2 - 5x/5x+y

Thanks! Simplify (p to the 2nd power-3)-(5-p+2p to the 2nd power)-(4p+5-2p to the 2nd power).
Whats the coefficient of p to the 2nd power?
F.1
G.2
H.4
I.5