exam Maths Puzzle Numerical Ability

Add. 5b^3 - 8b + 2b^2 and 3b^2 - 7b^3 + 5b.

I need a little help with this problem thanks.

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exam Other Question

Simplify. Assume that no denominator equals zero.

(2t^2)^3/(2t^3)^2
Simplify

3 times the square root of 2/3 - 2 times the square root of 150 + 3 times the square root of 3/2