a = abs();
a = sign();
a = rands();
a = min();
a = max();
a = sin();
a = cos();
a = asin();
a = acos();
a = tan();
a = atan();
a = atan2();
a = round();
a = ceil();
a = floor();
a = pow();
a = sqrt();
a = exp();
a = log();
a = ln();
a = str();
a = lookup();
a = dxf_dim();
a = dxf_cross();
a = version();
a = version_num();
a = len();