2345-1000:[19-2(21-18)2]
= 2345 - 1000 : [19-2x32 ]
=2345-1000 : [19 - 2x9]
= 2345 - 1000 : [19 - 18]
= 2345 - 1000 : 1
= 2345 -1000
= 1345
\(2345-1000\div\text{ }\left[19-2\left(21-18\right)^2\right]\)
\(=2345-1000\div\left(19-2.3^2\right)\)
\(=2345-1000\div\left(19-2.9\right)\)
\(=2345-1000\div\left(19-18\right)\)
\(=2345-1000\div1\)
\(=2345-1000\)
\(=1345\)
2345 - 1000 : [ 19 - 2 (21 - 18)2 ]
=2345 - 1000 : ( 19 - 2 x 32 )
=2345 - 1000 : ( 19 - 2 x 9 )
=2345 - 1000 : ( 19 - 18 )
=2345 - 1000 : 1
=2345 - 1000
=1345
2345 - 1000 : [ 19 - 2 (21 - 18)2 ]
=2345 - 1000 : ( 19 - 2 x 32 )
=2345 - 1000 : ( 19 - 2 x 9 )
=2345 - 1000 : ( 19 - 18 )
=2345 - 1000 : 1
=2345 - 1000
=1345
:))))^^^^
