exam Maths Puzzle Numerical Ability

find the cubic root of 3375 and please tell me the formula!!

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exam Other Question

2(t-3)+2=2(2t-6). The answer I got was -4, but the answer in the book is 4. What am I doing wrong. Could you please show me the distribution/elimination for this equation.

Thank you very much.
Simply the expression

3x(x^5)^2
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6x^3(x^2)^4