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ubixos / bin / sh / tests / expansion / cmdsubst19.0
@Charlie Root Charlie Root on 16 Jan 2018 203 bytes BSD Shell
# $FreeBSD: releng/11.1/bin/sh/tests/expansion/cmdsubst19.0 315168 2017-03-12 18:24:45Z jilles $

b=200 c=30 d=5 x=4
r=$(echo a)$(($(echo b) + ${x+$(echo c)} + ${x-$(echo d)}))$(echo e)
[ "$r" = a234e ]