﹙1﹚﹙-2χ²y³﹚²·﹙χy﹚³ =4χ^4y^6·χ³y³ =4χ^7y^9
﹙2﹚5χ²﹙χ+1﹚﹙χ-1﹚ =5χ²﹙χ^2-1﹚= 5χ^4-5χ^2
﹙3﹚59.8×60.2 = 3 599.96
(4) ﹙2a﹚³·b⁴÷12a³b² = 8a³·b⁴/12a³b²=2b² /3
﹙1﹚﹙-2χ²y³﹚²·﹙χy﹚³ =4χ^4y^6·χ³y³ =4χ^7y^9
﹙2﹚5χ²﹙χ+1﹚﹙χ-1﹚ =5χ²﹙χ^2-1﹚= 5χ^4-5χ^2
﹙3﹚59.8×60.2 = 3 599.96
(4) ﹙2a﹚³·b⁴÷12a³b² = 8a³·b⁴/12a³b²=2b² /3