logab(a,b)=log(b)/log(a) 
log10(x)=log(x)/log(10) 
ln(x)=log(x) 
cis(x)=cos(x)+i*sin(x) 
cot(x)=1/tan(x) 
coth(x)=cosh(x)/sinh(x) 
arccot(x)=arctan(1/x) 
arccoth(x)=arctanh(1/x) 
sec(x)=1/cos(x) 
sech(x)=1/cosh(x) 
arcsec(x)=arccos(1/x) 
arcsech(x)=arccosh(1/x) 
csc(x)=1/sin(x) 
csch(x)=1/sinh(x) 
arccsc(x)=arcsin(1/x) 
arccsch(x)=arcsinh(1/x) 
npr(n,r)=(n!)/(n-r)! 
ncr(n,r)=n!/(r!(n-r)!) 
xor(x,y)=or(and(x,not(y)),and(not(x),y)) 
prizmUIhandleKeys=1 
prizmUIkeyHandler(k,s)=(test( 
  k=30011,clear, 
  k=30014,draw, 
  k=149,log10(last), 
  k=181,10^last, 
  k=155,last^(-1), 
nil))
prizmUIfkey3label=329
prizmUIfkey6label=563