dd
ipublic <Escape>
:%s,\$this->,,g<Enter>                       /* we use , as delimiter because // interferes with the CPP */
:%s,\$,,g<Enter>
:%s,private var,private double var,<Enter>
/sqrt<Enter>
iMath.<Escape>
gg
/function<Enter>
dw
n
cwvoid<Escape>
n
.
n
cwdouble<Escape>
gg
/val<Enter>
idouble <Escape>      /* in vim <Escape> moves the cursor 1 cell back, hence 2n will not do the right thing */
fv                    /* accounts for this cursor is now at the start of "val" */
2n.
Gdd