$$\int\:\frac{\left(3x-5\right)}{\left(x-1\right)\left(x^2-1\right)}dx$$

$$x^2-9500=30,500$$

$$\tan\left(54\right)\tan\left(6\right)$$

$$e^{3y}dy=e^{2x}dx$$

$$\left(2x^2-3\right)\left(2x^2+5\right)$$

$$2ax^3-3ay^3$$

$$\int_{300}^{\infty}\left(195x^{12}e^{-15x^{13}}\right)dx$$