static Expr MultiplyConvoultion(IContext context, Expr arg)
{
return arg
.With(x => MultiplyExpressionExtractor.ExtractMultiply(x))
.ConvertAs<MultiplyExpr>()
.With(x => {
FunctionExpr lnExpr = x.Args
.Where(y => y is FunctionExpr)
.Cast<FunctionExpr>()
.FirstOrDefault(y => context.GetFunction(y.FunctionName) is LnFunction);
if(lnExpr != null) {
return new ConvolutionExprBuilder(context).Power(lnExpr.Args.First(), Expr.Multiply(x.Args.Where(y => y != lnExpr)));
}
return null;
});
}
