<?php $a = b::c() * 2; $a = b::c() + 2; $a = b::c() / 2; $a = b::c() % 2;
<?php $a = -b::c();
<?php 'a' . $b->c($d) + 'e'; 'a2' . b::c($d) + 'e2'; 'a' . $b->c($d) + 1; 'a2' . b::c($d) + 2; 'a' . $b->c($d) * 1; 'a2' . b::c($d) * 2;
<?php 'a' ** $b->c($d) + 3; 'a2' ** b::c($d) - 4; +1 ** 3; +2 ** (-3);
<?php $a = b::c();
<?php $a = b::c() . 'd';