$$\sec^2\left(x\right)\sin^4\left(x\right)$$

$$6\sqrt{2}\cos\left(x\right)+1=7$$

$$\tan\left(x\right)=\sin\left(x\right)\cdot\cos\left(x\right)$$

$$\frac{1}{sec^2x}=\:cos^2x$$

$$\frac{dy}{dx}=\left(1+x^2\right)sec\:y$$

$$\left(2x+5\right)\left(4x^2-25\right)$$

$$\int e^{\frac{kt}{c}}dt$$