test: add Power CalcFormulaValue test case

calc_test.go

@@ -5921,6 +5921,15 @@ func TestFile_CalcFormulaValue(t *testing.T) {
 			},
 			wantResult: "5",
 		},
+		{
+			name: "test Power CalcFormulaValue",
+			f:    prepareCalcData(cellData),
+			args: args{
+				sheet:   "Sheet1",
+				formula: "A1^2+LN(B1)",
+			},
+			wantResult: "2.386294361119891",
+		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {