Integral Calculus Answers

Use polar coordinates to find the volume of the solid that is above the xy-plane, inside the cylinder x[sup]2[/sup]+ y[sup]2[/sup]-ay = 0 and inside the ellipsoid x[sup]2[/sup]/a[sup]2[/sup] + y[sup]2[/sup]/a[sup]2[/sup] + z[sup]2[/sup]/c[sup]2[/sup] = 1.

how can we make numbers from 1 to 15 with three 2? (you can make this numbers only with+,-,*,/,√,⌊…⌋,⌈…⌉,...^...) e. g. :6=2+2+2 3=(2+2)-⌊2√⌋ please answer me only if you can make all of the numbers