`sin 30^o`
`cup`
`phi`
`theta`
`x_i^2`
`x^2_i`
`sum_1^10`
`sum_{i=1}^10 i^2`
`int_1^10`
`{a+b}/{c+d}`
`frac ab`
`sqrt{x^8}`
`{frac xy}^{1/3}`
`sqrt[3]{frac xy}`
`lim_{x to theta}`
`lt`
`gt`
`le`
`ge`
`times`
`div`
`cdot`
`a b ldots c`
`dp`
`a b cdots c`
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