function testAsech()
 {
     /*{{{*/
     $tmp = Math_ComplexOp::asech($this->cnum1);
     $this->assertEquals('-1.27677222662 + 1.09650722473i', $tmp->toString());
 }
echo "cosh(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::tanh($a);
echo "tanh(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::sech($a);
echo "sech(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::csch($a);
echo "csch(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::coth($a);
echo "coth(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::asinh($a);
echo "asinh(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::acosh($a);
echo "acosh(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::atanh($a);
echo "atanh(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::asech($a);
echo "asech(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::acsch($a);
echo "acsch(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::acoth($a);
echo "acoth(a) = " . $z->toString() . "\n";
if (!Math_ComplexOp::areEqual($a, $b)) {
    echo "a != b\n";
}
$z = Math_ComplexOp::add($a, $b);
echo "add(a, b) = " . $z->toString() . "\n";
$z = Math_ComplexOp::sub($a, $b);
echo "sub(a,b) = a - b = " . $z->toString() . "\n";
$t = Math_ComplexOp::sub($b, $a);
echo "b - a: " . $t->toString() . "\n";
$t = Math_ComplexOp::sub($b, Math_ComplexOp::conjugate($a));