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<link rel="stylesheet" href="https://use.fontawesome.com/releases/v6.2.0/css/all.css"/>
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<link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.13.0/css/all.min.css" rel="stylesheet">
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// USE THIS
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.2.0/css/all.min.css" integrity="sha512-xh6O/CkQoPOWDdYTDqeRdPCVd1SpvCA9XXcUnZS2FmJNp1coAFzvtCN9BmamE+4aHK8yyUHUSCcJHgXloTyT2A==" crossorigin="anonymous" referrerpolicy="no-referrer" />
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v6.1.1
<link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.1.1/css/all.min.css" integrity="sha512-KfkfwYDsLkIlwQp6LFnl8zNdLGxu9YAA1QvwINks4PhcElQSvqcyVLLD9aMhXd13uQjoXtEKNosOWaZqXgel0g==" crossorigin="anonymous" referrerpolicy="no-referrer" rel="stylesheet" />
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<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.15.4/css/all.css" integrity="sha384-DyZ88mC6Up2uqS4h/KRgHuoeGwBcD4Ng9SiP4dIRy0EXTlnuz47vAwmeGwVChigm" crossorigin="anonymous"/>
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//version 6
<link href="https://fonts.googleapis.com/css2?family=Fredoka:wght@300..700&family=Montserrat:ital,wght@0,100..900;1,100..900&display=swap" rel="stylesheet" />
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// my kit
<script src="https://kit.fontawesome.com/a33530bb41.js" crossorigin="anonymous"></script>
//add css cdn
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.15.4/css/all.css">
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<script src="https://cdnjs.cloudflare.com/ajax/libs/material-ui/5.0.0-beta.5/index.js" integrity="sha512-uKxirna7d5STmVXEMQYBVRW1nERrqHjwOubv4QcK4oYaaifLiEnN/aLIJxVsyK4R1K+awpNIG73RaQfT1DZ8ew==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
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<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.1.1/css/all.min.css" integrity="sha512-KfkfwYDsLkIlwQp6LFnl8zNdLGxu9YAA1QvwINks4PhcElQSvqcyVLLD9aMhXd13uQjoXtEKNosOWaZqXgel0g==" crossorigin="anonymous" referrerpolicy="no-referrer"/>
<link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.13.0/css/all.min.css" rel="stylesheet">
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<script defer src="https://use.fontawesome.com/releases/v5.15.4/js/all.js" integrity="sha384-rOA1PnstxnOBLzCLMcre8ybwbTmemjzdNlILg8O7z1lUkLXozs4DHonlDtnE7fpc" crossorigin="anonymous"></script>