$$\left(3a^2+2b^2\right)\left(a^2-b^2\right)$$

$$y=e^{1-x}$$

$$\int\left(\frac{2}{5x+1}\right)dx$$

$$-72y+16$$

$$3\csc^2\left(x\right)-8=-7\cot\left(x\right)$$

$$\frac{x}{\left(x^2+x-2\right)}$$

$$78,23\:+\:14,94$$