Упростите выражение 1) -3/40 (-2a - (1/3 + 12a )) - 1/7 (14a - (7 + 2/3a)) 2) 2/15 (3/4b - 0.5 ( 3/5 - 4b)))

1)   ...............=3/20 а+1/40+9/10 а - 2а+1+2/21 а=1 1/40 - 1 359/4202)   ..............=2/15*(3/4 b - 3/10+2b)=1/10 b - 1/25+1/15 b=3/30 b+2/30 b - 1/25=1/6 b - 1/25