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Question : Simplify the expression $\frac{s^2+t^2+2 s t-u^2}{s^2-t^2-2 t u-u^2}$, provided $(s+t+u) \neq 0$.

Option 1: $\frac{s+t-u}{s-t-u}$

Option 2: $\frac{s+t+u}{s-t+u}$

Option 3: $\frac{s-t-u}{s+t-u}$

Option 4: $\frac{s-t+u}{s+t+u}$

Question : Identify the pair of synonyms from the underlined words in the given sentence.
It was a fairly foul day, as omens could be seen in abundance from the threshold of his border town ever since the dawn struck.

Option 1: fairly, abundance

Option 2: foul, omens

Option 3: day, border

Option 4: threshold, dawn