book Maths Puzzle Numerical Ability

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1 1/15 + 3 3/10 - 2 4/5

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The square root of M^2/N^3. Hi
I'm really stuck on this problem. Someone please help me solve it because i have this assignment due soon. Thanks
Write the fraction as a sum of terms.
{x^2-4x+2/x}. I don't