borrar
paréntesis grandes
$$\left( \frac{1}{x} + \frac{1}{x+16} \right) 15 = 1$$
$$\text{Datos }\left\{\begin{aligned}a &= 800\,m. \\b &= 900\,m. \\A &= 47,80^0\end{aligned}\right.\quad ; \quad\text{Incógnitas }\left\{\begin{aligned}B \\C \\c\end{aligned}\right.$$
$$ \begin{aligned} x+2 &= 5 x &= 3 \end{aligned} $$