5*-4-3*2
cot(π\piπ /7)/tan(5 π\piπ /14)+tan( π\piπ /5)/tan(4 π\piπ /5)
9x-6=30
5+9x=32
20-4x=8
35712:13824
simplify this ratio
2y=18
44x+7x-22
(5x - 1)2
find two numbers that multiply to give 90 and have a difference of 13
