Correct

繁难

/ fán nán / 
Strokes

Example

As an Adjective

complicated; entangled; convoluted

1
Yùdào
遇到
fánnán
繁难
de
的
shì
事

get into trouble; be entangled in a web of difficulties

2
Fánnán
繁难
de
的
wèntí
问题

knotty/knotted problem; Gordian knot

3
Fánnán
繁难
de
的
shùxué
数学
tí
题

complicated mathematical problem

4
Fánnán
繁难
de
的
rènwu
任务

arduous task