Плиз, решите, срочно нужно >///
1) (3x+y)-(x-4y) 3x+y-x+4y 2x+5y 2) (x+6y)-(8x-y) x+6y-8x+y 7y-7x 7(y-x) 3) (m+n)+(m-n) m+n+m-n 2m 4) (6m+5)-(m-1) 6m+5-m+1 5m+6 5) (2x+y)-(x+y) 2x+y-x-y x 6) (2m-3n)+(2m+3n) 2m-3n+2m+3n 4m
