Question

[900-(605-235x2-38x3)x2]-100=
50x4-[8x5:4x (97-51)+1×7]+3×5=
(88:8+7)×10+[25+(299-77×3)]+12=
3×{8-2×[3+(33-8×4):1]}=
5+5×{5+5×[5+5×(5-5)]}-5×30=
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Answer 1

[900-(605-235x2-38x3)x2]-100=
[900-(605-470-114)x2]-100=
(900-21x2)-100=
(900-42)-100=
858-100=758


50x4-[8x5:4x (97-51)+1×7]+3×5=
50x4-(8x5:4x 46+1×7)+3×5=
200-(40:4x 46+7)+15=
200-(10x 46+7)+15=
200-( 460+7)+15=
200-467+15=-252

(88:8+7)×10+[25+(299-77×3)]+12=
(11+7)×10+[25+(299-231)]+12=
18×10+(25+68)+12=
180+93+12=285

3×{8-2×[3+(33-8×4):1]}=
3×{8-2×[3+(33-32):1]}=
3×[8-2x(3+1:1)]=
3×[8-2x(3+1)]=
3×(8-2x4)=
3×(8-8)=3x0=0

5+5×{5+5×[5+5×(5-5)]}-5×30=
5+5×[5+5x(5+5×0]-5×30=
5+5×(5+5x5)-5×30=
5+5×(5+25)-5×30=
5+5×30-5×30=
5+150-150=5