"I can't even add."
Posted on September 5, 2016, at 9:22 a.m. ET
"It might've been on my mind because we just finished the vector unit in physics class," she said.
Her tweet has now been retweeted more than 23,000 times.
Kassy Cho is a reporter for BuzzFeed News and is based in London.
Contact Kassy Cho at firstname.lastname@example.org.
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