![image](https://tex.z-dn.net/?f=C_7H_8+%2B+Br_2+-+%3E+C_7H_7Br+%2B+HBr+%5C%5C+C_7H_7Br+%2B+NaOH+-+%3E+C_7H_8O+%2B+NaBr+%5C%5C+C_7H_8O%2BCH_3Cl+-+%3E+C_7H_7Cl+%2B+CH_4O+%5C%5C+C_7H_7Cl%2B+KMnO_4+-+%3E+C_7H_5O_2%2BH_2KMnO_2)
C_7H_7Br + HBr \\ C_7H_7Br + NaOH - > C_7H_8O + NaBr \\ C_7H_8O+CH_3Cl - > C_7H_7Cl + CH_4O \\ C_7H_7Cl+ KMnO_4 - > C_7H_5O_2+H_2KMnO_2" alt="C_7H_8 + Br_2 - > C_7H_7Br + HBr \\ C_7H_7Br + NaOH - > C_7H_8O + NaBr \\ C_7H_8O+CH_3Cl - > C_7H_7Cl + CH_4O \\ C_7H_7Cl+ KMnO_4 - > C_7H_5O_2+H_2KMnO_2" align="absmiddle" class="latex-formula">