exam Maths Puzzle Numerical Ability

factor each expression:

8-m^6

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exam Other Question

please help me
let f(X)=x/6 , x=1,2,3,zero elsewhere be the pdf of x , find the distribution function and the pdf of y=x^2 (3x^2+2x-5/5x+1)+(2x^2-x+6/5x+1)

I have no idea how to do this problem
Key ^=exponents /=all over or fraction