calculate the variance in the product of constant a negligible error and variable a. concode_field_sep PlaceHolder placeHolder concode_field_sep double aA concode_elem_sep double A_plusMinus_B concode_elem_sep double aA_plusMinus_bB concode_elem_sep double AB concode_elem_sep double var_AB concode_elem_sep double var_sqrt_A concode_elem_sep double ln_A concode_elem_sep double exp_A concode_elem_sep double exp_bA concode_elem_sep double var_A_plusMinus_B concode_elem_sep double var_aA_plusMinus_bB
double function ( double arg0 , double arg1 ) { return arg0 * arg0 * arg1 * arg1 ; }