🇷²

#r squared #regional indicator r #variable r #power of 2

®️²

#r squared #registered symbol #circled r #variable r #power of 2

r*⚪

#radius #math r #round function #variable r

⭕📏r

#radius #symbol r #variable r

🇷✖️🇷

#r times r #r squared #variable r #factor

🇷⚡️²

#r power 2 #r squared #variable r