Evaluate the following : a). 3/4 + [ -2/3 ] - 5/4... b). [ -7/9 ] + 2 + [ 6/-7 ] - 13 / 21... c). 1/2 - 2/3 + [ 3/-4 ] + 0 + [ -5/6 ]
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it just a it on toppor
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