$$\frac{5^{x-2}-6\times5^{x+2}}{13\times5^{x}-2\times5^{x+2}}$$
$\frac{3749}{925}\approx 4.052972973$
$\frac{23 \cdot 163}{5 ^ {2} \cdot 37} = 4\frac{49}{925} = 4.052972972972973$
