2(2.5+5)
2/3 x 5/6
|5x-3|>=7
5 1/2+3/4
2/3-1/2
6 − (2 × 5) + 10 =
(1+1/99)^99=2 26054072470054645468562418874238911880866247143651779513948005515289485908944495315717869997974353454411804222090334...
d/dx(xlogx/(x-1))
6.53-7.5
