- $ \\\exists x \\\in {\\\text{R}}:x > {x^2}$
- $ \\\forall x \\\in {\\\text{Z}}:x \\\geqslant 3x$
- $ \\\forall x \\\in {\\\text{R}}:\\\sqrt {{x^2}} = x$
- $ \\\exists x \\\in {\\\text{R}}:{x^2} < 0$