$$\left(y^2\:\cdot\:-3\right)\cdot\:2$$

$$x^2\left(\frac{2\ln\:\left(x\right)-3}{x^3}\right)+5x\left(-\frac{\ln\left(x\right)-1}{x^2}\right)+4\left(\frac{\ln\left(x\right)}{x}\right)=0$$

$$3x^2+9x$$

$$\csc a=\frac{6}{5}$$

$$log\left(x+1\right)-log\left(x\right)$$

$$4x^4+4x^3+x^2$$

$$\int_0^{45}2000e^{-.08}dt$$