4/5 - 1/3 = 12/15 - 5/15 = 7/15
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1 and 4 fifths.
-1 1/3 minus three is -4 1/3
1 divided by x to the third power equals x to the negative third. The derivative of x to the negative third is minus three x to the negative fourth.
-1 -1/3 = -1 1/3
It is: 2 and 1/3 minus 2/5 = 29/15 or 1 and 14/15