$$100x^225y^2$$

$$4^3-4^2+\sqrt{100^2}$$

$$\frac{\tan^2\left(x\right)}{\sin\left(x\right)\left(1+\cos\left(2x\right)\right)}$$

$$\left(6ay+y^2\right)$$

$$\frac{a^8+243}{a+3}$$

$$cos\left(u+v\right)+cos\left(u-v\right)=2cos\:u\:cos\:v$$

$$4x^2+6=10x$$