x^2-2y-4+xy
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An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. ... Ecosystems can be very large or very small.
#ᴘʟss ғʟᴡ ᴍᴇ ɪ ғʟᴡ ʏᴏᴜ ʙᴀᴄᴋ ᴀɴᴅ ɢᴀᴠᴇ ᴛʜᴀɴᴋs ᴛᴏ ʏᴏᴜ ✌❤❤#
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