A negative exponent means that that factor is in the wrong place in the faction; if it is in the numerator (with a negative exponent), it belongs in the denominator; for example: 3x^-5 = 3 / x^5.
5 · x^-11 · y^2 · z^-5 (The 5 and the y-terms have positive exponents so they stay on top; the x and z-terms have negative exponents so they move down.)
= 5 · y^2 / ( x^11 · z^5 )
A negative exponent means that that factor is in the wrong place in the faction; if it is in the numerator (with a negative exponent), it belongs in the denominator; for example: 3x^-5 = 3 / x^5.
5 · x^-11 · y^2 · z^-5 (The 5 and the y-terms have positive exponents so they stay on top; the x and z-terms have negative exponents so they move down.)
= 5 · y^2 / ( x^11 · z^5 )