Question

30+(20+6•3)•{5+4•[60-(23-13)•6]}30+(20+6•3)•{5+4•[60-(23-13)•6]}

Answer 1

= 30+(20+18)·{5+4·[60-10·6]}·30+(20+18)·5+4·[60-10·6]}=
= 30+38·{5+4·[60-60]·30+38·5+4·[60-60]}=
= 30+38·{5+4·0·30+190+4·0}=
= 30+38·{5+190}
=30+38·195=
=30+7410=
=7440