exam Maths Puzzle Numerical Ability

how do i simplify this problem? y^3/5( y^1/2-y^-1/2)

thanks

J

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exam Other Question

m-6=1/2(8-18m)

6b+2(b+1)=-14 Solve the inequality

55. -7/11d + 2 < 2/3

Any help with this equation would be Greatly</b> appreciated.