(52)²
308750
1887125
993815
251239
3774250
1987630
13511390
16087698
expand with identity : (52)²
67 fraction
1231+46857-37849844940+039740-993993
56lcm
(4/5a + 5/4b)²
-3 × {(-4) + ___} = -3 × 5
