98.1-64.9
lcm
0.72,9.64,0.868
22/7*21*21
21+21
850000x=1
2x+5y=1
$x^{2}$ +5xy- $4y^{2}$ +10=0
log(2.5*10^-6)
-log(2.5*10^-6)
$-41x^{2}$ +41x+6=0
log(2.5*10-6)
-66y-41=0
