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100

 (20+10) x 2

what is 60

100

P in pemdas

parenthases

100

( )

Parenthases

200

(100x2) / 5

what is 40

200

e  in pemdas

exponents

200
2^3

2 cubed

300
[(10x2) x50] 

1000

300

m in pemdas

 multiply

300

[ ]

bracket

400

{[( 90 x 4) x 4] + 123}

1563

400

d in pemdas

division

400

a problem with no equal sign

 expression

500
[{( 10000x 2) / 5] + 10023}

14,023

500
A and S in pemdas

 add and subtract

500

{ } 

braces