I wrote:

"It come to my understanding..." -> "I have come to understand..." or simply "I understand..." "It has come to my attention..." could work too, but isn't really intended to be used like this, I don't believe.

"Respect to the..." -> "With respect to the..."

"Normal" contractions are fine even in formal writing (though not in legal writing), as long as they're not overused and not "slang" (jerga?) such as "ain't" (am not / is not).