# feSquare function Null safety

List<int?> feSquare(
1. dynamic f
)

## Implementation

``````List<int?> feSquare(f) {
var f0 = f[0];
var f1 = f[1];
var f2 = f[2];
var f3 = f[3];
var f4 = f[4];
var f5 = f[5];
var f6 = f[6];
var f7 = f[7];
var f8 = f[8];
var f9 = f[9];
var f0_2 = 2 * f[0];
var f1_2 = 2 * f[1];
var f2_2 = 2 * f[2];
var f3_2 = 2 * f[3];
var f4_2 = 2 * f[4];
var f5_2 = 2 * f[5];
var f6_2 = 2 * f[6];
var f7_2 = 2 * f[7];
var f5_38 = 38 * f5; // 1.31*2^30
var f6_19 = 19 * f6; // 1.31*2^30
var f7_38 = 38 * f7; // 1.31*2^30
var f8_19 = 19 * f8; // 1.31*2^30
var f9_38 = 38 * f9; // 1.31*2^30

var h0 = f0 * f0 +
f1_2 * f9_38 +
f2_2 * f8_19 +
f3_2 * f7_38 +
f4_2 * f6_19 +
f5 * f5_38;
var h1 = f0_2 * f1 + f2 * f9_38 + f3_2 * f8_19 + f4 * f7_38 + f5_2 * f6_19;
var h2 = f0_2 * f2 +
f1_2 * f1 +
f3_2 * f9_38 +
f4_2 * f8_19 +
f5_2 * f7_38 +
f6 * f6_19;
var h3 = f0_2 * f3 + f1_2 * f2 + f4 * f9_38 + f5_2 * f8_19 + f6 * f7_38;
var h4 = f0_2 * f4 +
f1_2 * f3_2 +
f2 * f2 +
f5_2 * f9_38 +
f6_2 * f8_19 +
f7 * f7_38;
var h5 = f0_2 * f5 + f1_2 * f4 + f2_2 * f3 + f6 * f9_38 + f7_2 * f8_19;
var h6 = f0_2 * f6 +
f1_2 * f5_2 +
f2_2 * f4 +
f3_2 * f3 +
f7_2 * f9_38 +
f8 * f8_19;
var h7 = f0_2 * f7 + f1_2 * f6 + f2_2 * f5 + f3_2 * f4 + f8 * f9_38;
var h8 =
f0_2 * f8 + f1_2 * f7_2 + f2_2 * f6 + f3_2 * f5_2 + f4 * f4 + f9 * f9_38;
var h9 = f0_2 * f9 + f1_2 * f8 + f2_2 * f7 + f3_2 * f6 + f4_2 * f5;

return [
h0,
h1 as int?,
h2 as int?,
h3 as int?,
h4 as int?,
h5 as int?,
h6 as int?,
h7 as int?,
h8 as int?,
h9 as int
];
}``````