$$0.05+0.025+0.25$$

$$\lim_{x\to0}\left(\frac{\cos\left(x\right)^{\sin\left(x\right)}}{sin\left(x\right)^{\sin\left(x\right)}}\right)$$

$$-50y^2+32x^2$$

$$\left(3x+2y-z\right)+\left(2x+3y+z\right)$$

$$9x^2-66x+121$$

$$23+15+6+6$$

$$6-\frac{1}{2}\cdot12$$