Add Maths Content in Post and Pages

Hello
Friends,
https://engimaths.in/ , this is my site you can open and check it… Now you can see that in my site i have added the images insted of maths content because i have try to paste the maths content from back end but in will not hsown to my froend pagess. so what i suppose to do… Please suggest any plugin or any code so i can add the maths content insted of imagess… This site is used for engineering student.. Where they can find the solve maths example…

Thanks