Question

Resolver
-1/2+{[3/7-(1/4-5/2)]-(3/2-5/4x1/7)}

Answer 1

-1/2+{[3/7-(1/4-5/2)]-(3/2-(5/4*1/7))}
-1/2+{[3/7-(-9/4)]-(3/2-(5/28))}
-1/2+{[3/7+9/4]-(37/28)}
-1/2+{(75/28)-(37/28)}
-1/2+{38/28}
-1/2+{19/14}
-1x7/2x7+(19/14)
-7/14+(19/14)
12/14=6/7

RPT=6/7