(x+6y)-(8x-y) (6 m +5)-(m-1) (2m - 3 n )+(2m+3n)
Х+6у-(48хm+40x-6ym-5y)-(2m²-3mn-2m+3n)=х+6у-48хm-40x+6my+5y-2m²+3mn+2m-3n=3mn+2m-3n-2m²+6my-48xm-39x+11y.