Psmith, the TeX bot, in fixed font mode:
pi
3.1415926535897932384626433832795028841971693993751058...
pi is a transcendental number
[3; 7, 15, 1, 292, 1, 1, 1, 2, 1, 3, 1, 14, 2, 1, 1, 2, 2, 2, 2, 1, 84, 2, 1, 1, 15, ...]
pi = 180 °
pi = -i log(-1)
pi = cos^(-1)(-1)
pi = 4 sum_(k=0)^infinity (-1)^k/(2 k+1)
pi = -2+2 sum_(k=1)^infinity 2^k/(binomial(2 k, k))
pi = sum_(k=0)^infinity (50 k-6)/(2^k binomial(3 k, k))
pi = 2 integral_0^infinity 1/(t^2+1) dt
pi = 4 integral_0^1 sqrt(1-t^2) dt
pi = 2 integral_0^infinity (sin(t))/t dt