$$n ^ { 4 } - 2 n ^ { 3 } - 3 n ^ { 2 } + 4 n + 4$$

$$\int\frac{3x+1}{8x^2+6x+1}dx$$

$$12x+11-4$$

$$2x-5y=20$$

$$-2\sin\left(x\right)-2\sin2\left(x\right)=0$$

$$a^2-\left(a+5\right)^2$$

$$64m^4n^2-196m^2n^2$$