To rewrite the expression with a positive exponent only, we can multiply the numerator and denominator by y^2:
(Y^-9 * y^2) / (y^-2 * y^2)
Now, we simplify each term:
Y^-9 * y^2 = Y^-7
y^-2 * y^2 = y^0 = 1
Thus, the expression can be rewritten as:
Y^-7 / 1 = Y^-7
Y^-9/y^-2
Rewrite with a positive exponent only
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