Running expressions are understood as expressions written in terms of 1 to 9 and 9 to 1 or 9 to 0 separated by one or more equality signs. Each digit appears once with basic operations, along with factorial and square-root. The work is written in increasing and decreasing order of digits, i.e., from 1 to 9 or 9 to 1 or 9 to 0. The work is divided in two parts. The first part is upto 3 digits, i.e., from 1 to 999. The second part is from four digits onwords. Below are some examples and links to dowload the work.
Links for download the work: Part I and Part II
Numbers Magic 
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