test template
1 x 2 {\displaystyle {\frac {1}{x^{2}}}}
dsfas
x − 3 y = 7 {\displaystyle x-3y=7}
x ′ + y 2 = z i 2 {\displaystyle x'+y^{2}=z_{i}^{2}}
a 1 > x 2 n / y 2 n > x ′ {\displaystyle a_{1}>x^{2n}/y^{2n}>x'}
