$$\frac{d^3}{dx^3}\left(e^{2x}\right)$$

$$\left(9x-4y\right)\left(4y+9x\right)$$

$$\left(-564\right)+\left(-12\right)$$

$$36+12.3+5.674$$

$$50+190$$

$$2.23606797749979^2$$

$$\frac{4\cot^2\left(x\right)+4}{\sin\left(x\right)\sec^2\left(x\right)-\sin\left(x\right)}$$