5 4\19*34\7 + 1 15\19:7\25-12\35

1.5 5//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)=25 8. 1 2//3=5//39. 25-(5//3)=(70//3)