book Maths Puzzle Numerical Ability

2 1/3{4/3-2/5(3/4+3/7)}

Can anyone help me solve this one.

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i need help dividing polynomials here are a couple problems 4x^3 - 8x^2 + x + 3/ 2x-3

#2 2-13x +24x^2 -3x^3 18x^4 / 1-3x marisa can someone please the factor the differences of two squares 2 question, thanks
b^2-144
x^-81