x+2/x $a^{2}$ -2x+1
7x-3 /2 =x
log7(7^5)
cos theta = √(1 -sin ^ 2 theta) which formula derive from
log7(7^5/6)
50 96 41 38 67 83 **
26 97 99 78 87 58 **
17 65 57 89 20 28 **
23 48 94 68 09 63 **
26 30 94 11 79 40 **
34 47 20 ** 70 53 **...
24(+3)
150+200+12.50
3 and1/2×2and1/3
5$x^{2}$+50x -48 $x^{2}$
