1.(-32/5+3)*(-1,5)*5/17
-17/5*(-3/2)*5/17
3/2
2. ((-5/2)*8+6*4/5)*1/2
(-5*4+24/5)*1/2
(-20+24/5)*1/2
-76/5*1/2
-38/5
3.(38/5*(-5/2)-83/20*(-10))*(2-79/25)
(-19+83/2)*(-29/25)
-9/2*29/5
-261/10
