5^-2 – 7^-3 / 5^-1 – 7^-1 By Admin ReiPosted on December 9, 2022 5^-2 – 7^-3 / 5^-1 – 7^-1 -4karena5^-2 – 7^-3 / 5^-1 – 7^-1 = 48/-12 = -4