сколько будет 5 4/19 * 3 4/7 + 1 15/19 : 7/25 - 1 2/3=?

1. 5 4//19=99//192. 3 4//7=25//73. (99//19)*(25//7)=(2475//133)4. 1 15//19=34//195. 7//25=0.286. (34//19)/0.28=(850//133)7. (2475//133)+(850//133)=258. 1 2//3=5//39. 25-(5//3)=(70//3)