Упростите выражение (с+1/с)^2-2 (m-2/m)^2-(m+2/m)^2 (x/у+у/х)^2-(x^2/у^2 + у^2/х^2) (a+a+1/а)^2-(a-a+1/а)^2

Упростим выражения.1) (с + 1/с)^2 - 2 = с^2 + 2c * 1/c + 1/c^2 - 2 = c^2 + 2 + 1/c^2 - 2 = c^2 + 1/c^2.2) (m - 2/m)^2 - (m + 2/m)^2 = m^2 - 2m * 2/m + 4/m^2 - (m^2 + 2m * 2/m + 4/m^2) = = m^2 - 2m * 2/m + 4/m^2 - m^2 - 2m * 2/m - 4/m^2 = -2m * 2/m - 2m * 2/m = -4 - 4 = -8.3) (x/у + у/х)^2 - (x^2/у^2 + у^2/х^2) = x^2/y^2 + 2 * x/y * y/x + y^2/x^2 - x^2/у^2 - у^2/х^2 = 2 * x/y * y/x = 2.4) (a + (a + 1)/а)^2 - (a - (a + 1)/а)^2 = a^2 + 2a * (a + 1)/a + (a + 1)^2/a^2 - (a^2 - 2a * (a + 1)/a + (a + 1)^2/a^2) == a^2 + 2a * (a + 1)/a + (a + 1)^2/a^2 - a^2 + 2a * (a + 1)/a - (a + 1)^2/a^2 = 2a * (a + 1)/a + 2a * (a + 1)/a == 2 * (a + 1) + 2 * (a + 1) = 4 * (a + 1) = 4a + 4.