doesn't work that well
UPDATE:http://scratch.mit.edu/projects/Interest/2258426 calculator ! is factorial sin is sine cos is cosine tan is tangent csc is cosecant: 1/sin sec is secant: 1/cos cot is cotan asin,acos,atan... sqrt: square root ^ is exponent mod is modulo log is base 10 ln is log base e MC is mem clear MR is mem read etc.