Упростите выражения 1) y^2-3y/25-y^2 - 7y-25/ 25-y^2 2) 9p+5/3p+6 - 10p-12/

1) (y - 3 * y)/(25 - y) (7 * y 25)/(25 - y) = (y - 3 * y (7 * y 25))/(25 - y) = (y - 3 * y 7 * y + 25)/(25 - y) = (y - 10 * y + 25)/(25 - y) = (y 5)/((5 y) * (5 + y)) = - (y 5)/((y 5) * (5 + y)) = (5 y)/(5 + y).

2) (9 * p + 5)/(3 * p + 6) (10 * p 12)/(3 * p + 6) + (9 * p 1)/(3 * p + 6) = (9 * p + 5 (10 * p 12) + 9 * p 1)/(3 * p + 6) = (9 * p + 5 10 * p + 12 + 9 * p 1)/(3 * p + 6) = (8 * p + 16)/(3 * p + 6) = (8 * (p + 2))/(3 * (p + 2)) = 8/3 = 2 2/3.

3) (7 * x + 5)/(3 x) + (5 * x + 11)/(x 3) = (7 * x + 5)/(3 x) - (5 * x + 11)/(3 x) = (7 * x + 5 (5 * x + 11))/(3 x) = (7 * x + 5 5 * x 11)/(3 x) = (2 * x 6)/(3 x) = - 2 * (3 x)/(3 x) = - 2.