$$\int\frac{84x+211.2}{\left(x-5\right)\left(x-3\right)\left(x+1\right)}dx$$

$$\left(8+3i\right)+\left(5+i\right)$$

$$\left(-x^4-15x^3+9x^2-6x-8\right)+\left(7x^4+6x^32x^2-6x+1\right)$$

$$\frac{0.5}{581.9}$$

$$1-tan\left(y\right)tan\left(x\right)=\frac{cos\left(x+y\right)}{cos\left(x\right)cos\left(y\right)}$$

$$y=\frac{x^3+2x^2}{cos2x^2}$$

$$x^2+58x=0$$