Running Expressions with Triangular Numbers - I

In previous works, running equalities are written in terms of 1 to 9 and 9 to 1 or 9 to 0 separated by single or double equality signs. Each digits is used with basic operations, along with factorial, square-root and Fibonacci sequence. These types of equalities, we called as running expressions. This work brings double and triple equality type running expressions with  triangular numbers along with basic operations. The work is up to 3 digits in increasing and decreasing orders. For 4 digits onwards the results shall be given later on.