1)89•47-(2547-972):25=4120
2)14151:53+(197+275)•33=15843
3)(45419+263544):(1203-596)=509
4)(361006-245440):(477+656)=102
1)89•47-(2547-972):25=4120
2)14151:53+(197+275)•33=15843
3)(45419+263544):(1203-596)=509
4)(361006-245440):(477+656)=102