Example: Add and simplify 6/(2x²-7) + (-3x-8)/(2x²-7).

Problem

Yuki and Blanca were each asked to perform the following operation:
start fraction, m, plus, 15, divided by, m, start superscript, 3, end superscript, end fraction, plus, start fraction, 2, m, minus, 1, divided by, m, start superscript, 3, end superscript, end fraction
Their answers are shown below:
YukiBlanca
start fraction, 3, m, plus, 14, divided by, m, start superscript, 3, end superscript, end fractionstart fraction, 3, m, plus, 14, divided by, 2, m, start superscript, 3, end superscript, end fraction
Which student is correct?
Please choose from one of the following options.