23÷[﹙﹣2﹚²－﹙﹣4﹚]＋3／4=23÷（4+4）+0.75=2.875+0.75=3.6253.75＋1／2－﹙﹢4﹚＋﹙﹣1／2﹚＋﹙﹣6﹚=3.75+0.5-4-0.5-6=-6.25