0	She needs to [MASK] that [MASK] gets only ten minutes.
8	Determine the [MASK] of [imath]f(x) = x + \sqrt{ 4 - x^2}[/imath] without [MASK]
4,12	Solve [imath]y''-4y'+4y=xe^x[/imath]
4	[imath]f(x, y)[/imath]
2	[imath]x + x = 2x[/imath]
10,11	With Euler's [MASK], it [MASK] to [imath]\int_0^\infty \frac{1+x^2}{1+x}dx[/imath]
6,12	Proof by [MASK] that [imath]n!>3n[/imath] [MASK] [imath]n>6[/imath]