best_gene.json

"{\"expression\": \"safe_sub(safe_add(safe_exp(safe_div(safe_mul(safe_div(half, one), safe_exp(half)), safe_add(safe_add(one, one), safe_div(half, half)))), relu(std(safe_sub(x, safe_sub(safe_log(y), safe_add(x, one)))))), one)\"}"