Question

integration of 1/y^2

Answer 1

\[\large \int\limits \frac{1}{y^2}\;dy \qquad =\qquad \int\limits y^{-2}\;dy\]

From here just apply the `Power Rule for Integration`:
~Increase the power by 1,
~Divide by this new exponent.

And of course, don't forget a constant of integration.