13 : [89+(68*0,2)-15] * 3,14 = ?

13: [89+(68*0,2)-15] * 3,14 =13:(89+13,6-15)*3,14=13:87,6*3,14=0,46598(17351598)

13 : [89+(68*0,2)-15] * 3,14 = 13:[89 + 13,6*-15]*3,14=13: 87,6*3,14=0,148*3,14=0,465

13:[89+(68x0,2)-15]x3,14= 13:[89+13,6-15]x3,14= 13:87,6x3,14= 0,148x3,14= 0,465