\(=\dfrac{4678^2+4678+4678\cdot31+2\cdot31+4648}{4678^2+3\cdot4678+2-4678^2-4678}\)
\(=\dfrac{4678^2+4678\cdot32+4678+32}{2\cdot4678+2}=\dfrac{4678\left(1+4678\right)+32\cdot4679}{2\left(4678+1\right)}\)
\(=\dfrac{4678+32}{2}=2355\)
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