Question

calcular: 5x5+6-3+5x7

Answer 1

5.5+6-3+5.7
25+6-3+35
28+35
=63

Answer 2

multiplica 5x5=25 a 6 le resta 3,  6-3=3 y multiplicas 5x7=35

te queda:  25+6+35=63