Nickahviz
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²[tex] \frac{4s+3st}{s ^{2} t ^{2} }- \frac{s-2st}{s ^{2} t ^{2}} [/tex]

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Jameskino25viz
[tex] \frac{24s+3st}{ s^{2} t^{2} } - \frac{s-2st}{ s^{2} t^{2} } \\ \\ = \frac{24s+3st-s+2st}{ s^{2} t^{2} } \\ \\ = \frac{23s+5st}{ s^{2} t^{2} } [/tex]