published on: 2013-06-29 14:35:33
quase-bi.tumblr.com/post/54181490070/
quase-bi.tumblr.com/post/54181501027/
▲= b² - 4.a.c
Open Happiness
quase-bi.tumblr.com/post/54182367288/
quase-bi.tumblr.com/post/54182379975/
published on: 2013-06-29 14:35:33
quase-bi.tumblr.com/post/54181490070/
quase-bi.tumblr.com/post/54181501027/
▲= b² - 4.a.c
Open Happiness
quase-bi.tumblr.com/post/54182367288/
quase-bi.tumblr.com/post/54182379975/