当-1大于A大于2时,化简「3A-2「A+1「当-1小于A小于2时,化简「3A-2「A+1「

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当-1大于A大于2时,化简「3A-2「A+1「当-1小于A小于2时,化简「3A-2「A+1「当-1大于A大于2时,化简「3A-2「A+1「当-1小于A小于2时,化简「3A-2「A+1「当-1大于A大于

当-1大于A大于2时,化简「3A-2「A+1「当-1小于A小于2时,化简「3A-2「A+1「
当-1大于A大于2时,化简「3A-2「A+1「
当-1小于A小于2时,化简「3A-2「A+1「

当-1大于A大于2时,化简「3A-2「A+1「当-1小于A小于2时,化简「3A-2「A+1「
式子写清楚点,看不懂啊