<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">Hi</div><div class=""><br class=""></div><div class="">i have a problem in my code!</div><div class=""><br class=""></div><div class="">here is my code:</div><img apple-inline="yes" id="02F39FF2-ED92-4878-9D6C-FE77ED3940CB" height="389" width="610" apple-width="yes" apple-height="yes" src="cid:22E78409-4B2D-4907-8ADF-A40FD76DF7F5" class=""><div class=""><br class=""></div><div class="">here is error message:</div><div class=""><br class=""></div><div class=""><img apple-inline="yes" id="4CEE4047-9BD0-4799-A3A4-8A7EAF57477B" height="152" width="375" apple-width="yes" apple-height="yes" src="cid:C6FEB6E1-8BDA-4837-AF14-F06EBE296C84" class=""></div><div class=""><br class=""></div><div class="">in very bottom function (polyEvaluate), why is not working “result <- map (\(a,b) -> a+b) powers” ???</div><div class=""><br class=""></div><div class="">in Prelude, it is working</div><div class=""><br class=""></div><div class=""><img apple-inline="yes" id="4630577A-44DD-4017-9763-313FFF3972D4" height="46" width="285" apple-width="yes" apple-height="yes" src="cid:B2077ACB-2F62-4D6F-9ECA-92B1F7B0CB36" class=""></div><div class=""><br class=""></div><div class="">Thanks!</div></body></html>