如何使用php mysql显示数学方程式？ [关闭]

I am creating online exam portal using php mysql. For question i have created a table name question_master which have 7 fields.
1) question_id
2) question_description
3) ans_1
4) ans_2
5) ans_3
6) ans_4
7) correct_ans

I am facing a problem, how could I store questions that include mathematical equations like

and display these equations at question paper.
should i have to use image for this equation or ant other datatype in mysql

i suggest you to use image over text, text can easily be search through internet and give result but it's little different if you search image so if you don't want student to search for the answer then use image.