$$\int\left(cosx\right)\left(1-sinx\right)^3dx$$

$$\left(4.3-1.6\right)$$

$$5x^2-3x+6$$

$$12a^2+ab$$

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

$$\lim_{x\to\pi}\left(\frac{1-\sin\left(x\right)}{1+\cos\left(6x\right)}\right)$$

$$a+b-c-5a-5b+5c$$