https://math.he.net/question/ae15ea2d2ebc39589ac9da943bf7e66d59a65f10
75% is to 1/2 as 45% is to ______
25-18=7=37-30
512.30 - 15%=
5y x 6
what is the last prime number
0.75 is to 3⁄4 as 0.8 is to ______
does the set of all non-empty sets contain itself?
Integrate[Sqrt[4-9Power[x,2]],{x,0,Divide[2,3]}]
(x^(3)-1)/(x^(2)+y+z)+(y^(3)-1)/(y^(2)+x+z)+(z^(3)-1)/(z^(2)+y+x)