simplify:
y^a x y^a+2
y^a * y^a + 2
y^(2a) + 2
Not sure where you want to go with that.
or, assuming the usual carelessness with parentheses,
y^a y^(a+2) = y^(2a+2) = (y^(a+1))^2 = (y^2)^(a+1)
y^a x y^a+2
y^(2a) + 2
Not sure where you want to go with that.
or, assuming the usual carelessness with parentheses,
y^a y^(a+2) = y^(2a+2) = (y^(a+1))^2 = (y^2)^(a+1)