Question

y3-2y2- + 3y-4 for y+5

Answer 1

The way you have typed the formula is confusing.

y^2 = y squared

You have both - and + signs before 3y. If you mean both plus and minus (±), can be done by pushing + and Shift and alt/option (at least on a Mac).

Please repost with revised formula and be more specific about your question. Thanks for asking.