$$2\:+\:3\:+\:1t\:-\:7t$$

$$\int\left(x+4\right)^3\:\left(x-6\right)^4\:dx$$

$$4\sin^3x=\sin x$$

$$\sin\left(x\right)\cos\left(x\right)+\sin\left(x\right)^3\sec\left(x\right)=\tan\left(x\right)$$

$$\int\:\frac{2}{\sqrt{5-x^2}}dx$$

$$\int\left(\frac{e^2}{e^x-1}\right)dx$$