This printable bingo card set on the topic of Algebra has 24 unique items on a 4x4 grid. Each card draws from a pool of 24 items, so every player gets a different card.
6r
t-8
4s
x + 12
2n
y - 9
z + 8
n + 9
6 + 12
2b
7 + y
1/2 x d
x / 10
12 - x
x - 8
q - 4
m - 8
y + 11
2u
6x + 5
2 x (6 + y)
3t
5 - r
x/2