$$x-4\le1$$

$$2a^2+8a+4ax^2+16x^2$$

$$\int sen\left(\frac{x}{3}\right)cos\left(\frac{x}{17}\right)dx$$

$$\left(\frac{3}{4y}+\frac{1}{6}\right)\left(\frac{3}{4}y-\frac{5}{8}\right)$$

$$\int\:\left[\sin\left(ax\right)\right]^5\:\left(1-\:\left[\sin\left(ax\right)\right]^2\right)\:\cos\left(ax\right)\:dx$$

$$\left(3x+7\right)^4$$

$$\int\left(9x+12\right)^5dx$$