5x-y+4z=5 2x+3y+5z=2 5x-2y+6z=-1
(5.1,571),(6,36)
(5.1,571),(636)
365!/(2*x!)=365^x
7743049254
1616694711
37517529259
90052267395
b^2_7^b+10
(2,4),(1,-3)
7743049
161669
3751752
9005226
(5,-2),(-4,-3)
1663905
7128987
10178707
