))))))))))))))))))))))))))))))))))))))
2 11 /15 * 5 + 1 3/5 * 5 - 14/15 * 5 =
= (2*15+11)/15 * 5 + (1*5+3)/5 * 5 - 14/15 * 5=
= 41/15 *5 + 8/5 * 5 - 14/15 * 5 = 5 * ( 41/15 + 8/5 - 14/15) =
= 5 * (41/15 + 8*3/5*3 - 14/15) = 5 * (41/15 + 24/15 - 14/15) =
= 5 * (41+24-14)/15 = 5/1 * 51/15 = 5*51/15*1 = 5*51/15 =5*51/5*3 = 51/3 = 17
