exam Maths Puzzle Numerical Ability

can somebody please help me understand how to go about this question:
Find the term not involving y in the expansion of (1/y^3+y^2)^5. Please help!! Thank you.

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exam Other Question
I am not good with graphing can you help
Solve the following system of linear inequalities by graphing.
x - 2y greater than and equal to 4
x less than and equal to 4

thanks 8 qt/min=___gal/h