Help please Parse error: syntax error, unexpected TOK_FLOAT at line 13

```
Shader "FX/Water2D"
{
Properties
{
_UITime("Speed" , float) = 0.5
_UIZoom("Zoom" , float) = 7.0
_Waves("Waves & Alpha" , float) = (0.5,0.2,0.5,3.0)
_MainTex("Texture", 2D) = "white" {}
}
float _UITime;
float _UIZoom;
float4 _Waves;
sampler2D _MainTex;
fixed4 frag(v2f i) : SV_Target
{
float4 uv_texture = tex2D(_MainTex, i.uv);
float4 k = _Time * _UITime;
k.xy = i.uv * _UIZoom;
float val1 = length(0.5 - frac(k.xyw = mul(float3x3(float3(-2.0,-1.0,0.0), float3(3.0,-1.0,1.0), float3(1.0,-1.0,-1.0)),k.xyw) * _Waves.x));
float val2 = length(0.5 - frac(k.xyw = mul(float3x3(float3(-2.0,-1.0,0.0), float3(3.0,-1.0,1.0), float3(1.0,-1.0,-1.0)),k.xyw) * _Waves.y));
float val3 = length(0.5 - frac(k.xyw = mul(float3x3(float3(-2.0,-1.0,0.0), float3(3.0,-1.0,1.0), float3(1.0,-1.0,-1.0)),k.xyw) * _Waves.z));
return (pow(min(min(val1,val2),val3), 7.0) * _Waves.w) + uv_texture;
}
}
```