LATEX LIAN XI

$ a^2 ( ) 100 ~m ^{3}$

(lim_{n o infty} sum_{k=1}^n frac{1}{k^2} = frac{pi^2}{6})

(C {}^{12}_{6})

$sum_

(phi)

(mu)

(f[i][j] = max( f[i+1][j^2],f[i][j]))

(frac {x^2} {z} eq w)
(frac {x^2} {z} = w)

(y')

(sum_{k}^n)