الف) $\frac{\cos^{2}(45^{\circ})-\frac{\sqrt{2}}{2}\sin(45^{\circ})}{1-\tan^{2}(45^{\circ})}$

ب) $\frac{2\sin(45^{\circ})+\tan(45^{\circ})}{\cot(45^{\circ})+1\cot^{2}(45^{\circ})}$

ج) $\frac{\cos^{2}(45^{\circ})-\sin^{2}(45^{\circ})+\tan(45^{\circ})}{1-\tan^{2}(45^{\circ})}$

ت) $\frac{8\sin(45^{\circ})\times\cos(45^{\circ})-2\cos^{2}(45^{\circ})}{\sqrt{2}\cot^{2}(45^{\circ})+\tan^{2}(45^{\circ})}$