00:002004
00:01universal set
00:03a b c d e a
00:05a set a b c
00:06of course a b c minus
00:09d e
00:11one degree
00:121,7
00:15straight line x equal to y
00:17angle
00:18theta of 45
00:21pi by 4
00:225 pi upon 4
00:25a union b dash
00:28a intersection b dash
00:31a intersection b dash
00:33a intersection b dash
00:34a intersection b b
00:35union b b
00:377 upon pi 6
00:39how many degree
00:40pi to 180
00:42180 upon 6
00:4437
00:45120
00:4680 40 20
00:49s equal to a upon
00:521 minus r
00:531
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00:541
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