exam Maths Puzzle Numerical Ability

Write down the coefficient of the term 4x4y2z in the algebraic expression 4x4y2z - 3x3y2z + 3/2xy3z2.
Please help with this problem I have tried but I don't understand. Please hel

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exam Other Question
if you invest $100 at the end of each month in a fixed-interest mutual fund paying annual interest of 6% compounded monthly, how much will your investment be worth after 10 yrs? (2x-1)^2=8

x^2-4x+4=49

(8t-3)^2=0