{"count":2,"next":null,"previous":null,"results":[{"id":3,"title":"Calculus","formula":"\\frac{df}{dt}=\\lim_{h\\to0}\\frac{f(t+h)-f(t)}{h}","author":"Newton","year":"1668","category":"Calculus","description":"The derivative measures instantaneous rate of change.","stage":"live-demo"},{"id":4,"title":"Law of Gravity","formula":"F=G\\frac{m_1m_2}{r^2}","author":"Newton","year":"1687","category":"Physics","description":"Every mass attracts every other mass with a force proportional to their product and inversely proportional to distance squared.","stage":"live-demo"}]}