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Enter evaluates, ↑/↓ recall earlier lines. Start a line with + × ÷ ^ to continue from ans.

Type an expression, or name = expression to store the result.
+ − × ÷ ^ ( ) · juxtaposition (2 o1) · pi, e, tau · sin cos tan asin acos atan sinh cosh tanh exp ln log log2 sqrt cbrt abs floor ceil round sign min max pow atan2 · P Pcdf Ptail malay prob fact choose
Tryexamples
Memory
·nothing stored yet — assign with name = expression—
Tape
·nothing evaluated yet—

Notes​

  • Same grammar as the Bisection Calculator — but = here stores (margin = 0.05), it never solves. Equations in x belong on the Bisection page.
  • P(k, λ) is the Poisson pmf; Pcdf / Ptail are the ≤ / ≥ tails. Half-lines follow the market convention: Pcdf(2.5, λ) = P(X ≤ 2), Ptail(2.5, λ) = P(X ≥ 3).
  • malay(p) ⇄ prob(m) hop between implied probability and Malay odds; fact / choose cover the combinatorics. Names are case-insensitive.
  • The session (memory + tape) persists in this browser. Reset restores the worked-example script, Clear forgets everything.