exam Maths Puzzle Numerical Ability

Can someone help me with this problem?
I need to add this:

1/3 + (-5/6) + (-1/2)

Thanks,
Sher

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exam Other Question
Determine if the point (-5, 3) lies in the viewing window defined by Xmin = -3, Xmax = 12, Ymin = -6, Ymax = 15.

a. Yes
b. No subtract and simplify please show all steps:2/(x=1)-3/(x-3)