9-7×9+8-2
x+y>=7
3x-2y<=10
2
∫ 1 / √x (x + 1)(tan^-1(√x)^2 + 9) dx
672÷27×18+153-345
486=6*a*a
19.39794=log(a)+500,000×log(b)
a=?
b=?
∫ 1 / √x(x + 1)(tan^-1(√x)^2 + 9) dx
4 1/2
x^2+152.5^2=163.88^2+(x+60)^2-2(163.88)(x+60)\cos (68.52)
