$a)$
$\frac{123}{4567}$.$\frac{4}{8}$+$\frac{123}{4567}$.$\frac{-13}{8}$
`=`$\frac{123}{4567}$.`(`$\frac{4}{8}$ $\frac{-13}{8}$`)`
`=`$\frac{124}{4567}$.$\frac{-9}{8}$
`=`$\frac{-1107}{36536}$
$b)$
`4/7``+5/6``:5.0,375.`$(-2)^{2}$
`=4/7``+5/6``:5.0,375.4`
`=4/7+1/6.``3/2`
`=4/7+1/4`
`=23/28`
`c)`
`1``7/5.``5/6+6/7:7/3-(-2/7)`$^{2}$
`=``12/5.``5/6+6/7:7/3-(-2/7)`$^{2}$
`=``12/5.``5/6+``6/7:``7/3-``4/49`
`=2+18/49-4/49`
`=16/7`
$d)$
`(1,9-0,4):7/3-({-7}/4).`$(-2)^{2}$
`=(1,9-0,4):7/3-({-7}/4).4`
`=3/2:7/3-({-7}/4).4`
`=9/14-(-7)`
`=107/14`
