Question 663991
Just in case you are yet in need of a solution..(
{{{(3/4) + (-5/6)}}}
Create common denominators
{{{(3/4)*(6/6) + (-5/6)(4/4)}}}
creates
{{{(18/24) + (-20/24)}}}
combine by adding the negative
{{{(-2/24) = (-1/12)}}}

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