$$4y\left(4+3y\right)$$

$$\frac{csc\left(x\right)}{1+sen\left(x\right)}=sec^2\left(x\right)\cdot\:\left(csc\left(x\right)-1\right)$$

$$5a^2+55a$$

$$\frac{1}{\sin\left(x\right)\cdot\sin\left(x\right)}=\cot\left(x\right)$$

$$1\left(11\right)\left(0\right)$$

$$\frac{44y^{16}}{11y^6}$$

$$\int0.04e^{-0.04x}dx$$