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As rendered by TeX As rendered by your browser 1 $x 2 y 2$ 2 $F 3 2$ 3 $x + y 2 k + 1$ 4 $x + y 2 k + 1$ 5 $a b / 2$ 6 $a 0 + 1 a 1 + 1 a 2 + 1 a 3 + 1 a 4$ 7 ${a}_{0}+\frac{1}{{a}_{1}+\frac{1}{{a}_{2}+\frac{1}{{a}_{3}+\frac{1}{{a}_{4}}}}}$ 8 $( n k / 2 )$ 9 $( p 2 ) x 2 y p - 2 - 1 1 - x 1 1 - x 2$ 10 $∑ 0 ≤ i ≤ m 0 < j < n P ( i , j )$ 11 $x 2 y$ 12 $∑ i = 1 p ∑ j = 1 q ∑ k = 1 r a i j b j k c k i$ 13 $1 + 1 + 1 + 1 + 1 + 1 + 1 + x$ 14 $( ∂ 2 ∂ x 2 + ∂ 2 ∂ y 2 ) | φ ( x + i y ) | 2 = 0$ 15 $2 2 2 x$ 16 $∫ 1 x dt t$ 17 $∬ D dx dy$ 18 $f ( x ) = { 1 / 3 if 0 ≤ x ≤ 1 ; 2 / 3 if 3 ≤ x ≤ 4 ; 0 elsewhere.$ 19 $x + ... + x ⏞ k times$ 20 $y x 2$ 21 $∑ p prime f ( p ) = ∫ t > 1 f ( t ) d π ( t )$ 22 ${ ( a , ... , a ⏞ k a 's , ( b , ... , b ⏞ ℓ b 's ⏟ k + ℓ elements }$ 23 $( ( a b c d ) ( e f g h ) 0 ( i j k l ) )$ 24 $det | c 0 c 1 c 2 … c n c 1 c 2 c 3 … c n + 1 c 2 c 3 c 4 … c n + 2 ⋮ ⋮ ⋮ ⋮ c n c n + 1 c n + 2 … c 2 n | > 0$ 25 $y x 2$ 26 $x 92 31415 + π$ 27 $x y b a z c d$ 28 $y 3 ‴$