how do you solve the Shapes and Symbol math operations things

<p>like triange=4xskfskfjsj and so.............i always miss the one thats there!</p>

<p>they are in the blue book</p>

<p>Like F(:))=x^2 +1</p>

<p>find F(3:))?</p>

<p>lol :/ i think i know what you're talking about but can't think of a question... I think for those problems i just substitute the smiley face/triangle/square/etc.... with f(x).</p>