exam Maths Puzzle Numerical Ability

Simplify (-2a^2 b^3)^2/(2a^2 b)^3

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exam Other Question

2/3y=60
two over three times y equals sixty
I am not sure how to solve this equation, please show me step by step so that I will be able to do in the future
Can someone show me how to do this problem? thanks!

2X^2 + 7X + 3 =