$$\int x^{11}\left(3+x^{12}\right)^2\cdot dx$$

$$\left(-8y^5\right)\left(-6y^4\right)$$

$$\int\frac{x+4}{x-1}dx$$

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

$$3\lim_{x\to45}\frac{3-3\tan\left(x\right)}{\cos\left(x\right)-\sin\left(x\right)}$$

$$6x^2-3x+1=0$$

$$u^2+8u+16\:$$