$$\frac{8}{5}\cdot+\frac{6}{7}+\frac{5}{4}z$$
$\frac{5z}{4}+\frac{48}{35}$
$$\frac{8\times 6}{5\times 7}+\frac{5}{4}z$$
$$\frac{48}{35}+\frac{5}{4}z$$
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$\frac{175z+192}{140}$
$$\frac{192+175z}{140}$$