-1/3[2/5-1/2(1/3-1/5)] bagaimana​ cara pengerjaan soalnya?

Maaf kalau salah.......................

-1/3 [4/10-5/10 (5/15-3/15)]
-1/3 [-1/10 (2/15)]
-1/3 (-2/150)
2/450 : 2/2
1/225

Maaf kalo salah