book Maths Puzzle Numerical Ability

Simplify the Expression

(((16 ^5/4)))

(((125 ^-2/3)))

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book Other Question

tell if lines are parrallel, perpindicular, or neither!
3x-8y=313
x=367/5-8/5y how would i go about simplifying this equation?

r^3=151; r=?

thanks!