a+ab+b=19
x[x-3]add 2 ifx =1
$x^{1}$ + $x^{1}$
8p-8=2p-164
0.0001/0.01+0.2/0.005+0.09/0.1
a^{2} - 130a + 16 = 0
10+6*4-3
220+x+x-90+x=1390
186/1.24
220+x+90-x+x=1390
