When discussing and explaining some math equations, I sometimes prefer to use in-line equations (created by use $ ... $ in the text) in the text environment, as shown ONLY in the last two lines.
However, you have seen that the long in-line equation
is ugly arranged in text, with very big space. Do you have any method to let this in-line equation (automatically) have a norm space between each term, and at the same time, the extra part of this long equation can (automatically) start from the next line? Thanks in advance.