exam Maths Puzzle Numerical Ability

Can you please help me simplify:
-4x^-3/8(5x^1/8-x^2)
I would really appreciate your help.

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exam Other Question

How do you work these problems? I have no Idea where to start! Help!

Solve and graph the solution:

-12 is greater than or equal to 24x
Please help me with this equation!
If: z = 6(cos 205 degrees + i sin 205 degrees) and w = 3(cos 85 degrees + i sin 85 degrees), find z/w in polar form.

Thank you, Tami