HTML <sub> element
X<sub>1</sub> + Y<sub>1</sub> = 5
X1 + Y1 = 5
MgCl<sub>2</sub> + 2AgNO<sub>3</sub> = 2AgCl + Mg(NO<sub>3</sub>)2
MgCl2 + 2AgNO3 = 2AgCl + Mg(NO3)2
X<sub>1</sub> + Y<sub>1</sub> = 5
X1 + Y1 = 5
MgCl<sub>2</sub> + 2AgNO<sub>3</sub> = 2AgCl + Mg(NO<sub>3</sub>)2
MgCl2 + 2AgNO3 = 2AgCl + Mg(NO3)2