Is the comma in this sentence bad grammar You will be expected to complete your homework by deadline set class teachers here and work high standards terms of quality?

Yes, the comma usage in that sentence is incorrect. There are several issues:

1. Missing comma before "and": The sentence incorrectly combines two independent clauses (complete thoughts) with only the conjunction "and". A comma is needed before "and" to separate them.

2. Unnecessary commas: Commas are placed after "deadline" and "teachers" which are not separating independent clauses or items in a list. These commas are unnecessary.

3. Confusing phrasing: The phrase "here and work high standards terms of quality" is unclear and grammatically incorrect.

Here's how the sentence can be corrected:

"You will be expected to complete your homework by the deadline set by your class teachers. You will also be expected to work to high standards in terms of quality."

This revision separates the two ideas into separate sentences, uses commas correctly, and clarifies the meaning.