O Great Monks of Perl, upon running a program involving this subroutine, I receive the error: "Illegal declaration of subroutine main::profit." I've read over this repeatedly and have not found an error. 
sub profit = {
    (((($x-10)/20)*(((-1)*((1/10)*(10-$x)*($x+1)+1000) + sqrt(((1/10)*
+(10-$x)*($x+1)+1000)**2 - (($x-10)/5)*(1000*$x+200)))/(2*($x-10)/20))
+**3)/3 +(1/2)*((1/10)*(10-$x)*($x+1)+1000)*(((-1)*((1/10)*(10-$x)*($x
++1)+1000) + sqrt(((1/10)*(10-$x)*($x+1)+1000)**2 - (($x-10)/5)*(1000*
+$x+200)))/(2*($x-10)/20))**2+(1000*$x+200)*(((-1)*((1/10)*(10-$x)*($x
++1)+1000) + sqrt(((1/10)*(10-$x)*($x+1)+1000)**2 - (($x-10)/5)*(1000*
+$x+200)))/(2*($x-10)/20)));
}

[download]
The preview seems to have done strange things to the code, here it is in regular text: sub profit = { (((($x-10)/20)*(((-1)*((1/10)*(10-$x)*($x+1)+1000) + sqrt(((1/10)*(10-$x)*($x+1)+1000)**2 - (($x-10)/5)*(1000*$x+200)))/(2*($x-10)/20))**3)/3 +(1/2)*((1/10)*(10-$x)*($x+1)+1000)*(((-1)*((1/10)*(10-$x)*($x+1)+1000) + sqrt(((1/10)*(10-$x)*($x+1)+1000)**2 - (($x-10)/5)*(1000*$x+200)))/(2*($x-10)/20))**2+(1000*$x+200)*(((-1)*((1/10)*(10-$x)*($x+1)+1000) + sqrt(((1/10)*(10-$x)*($x+1)+1000)**2 - (($x-10)/5)*(1000*$x+200)))/(2*($x-10)/20))); }

In reply to Illegal subroutine by riceboyyy

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