$$-2.6d+-5.3+-5.1\left(-10d+-1.3\right)$$

$$\frac{dy}{dx}+y\cot\left(x\right)=-y^2\sin^2\left(x\right)$$

$$\frac{dy}{dx}=\frac{4x^3y}{y^4+y^2}$$

$$26+2.7+59.5$$

$$\log_{14}\left(\frac{\sqrt[9]{17}}{s^2r}\right)$$

$$-7y^2-y+6y^2-3y-1$$

$$8a+b+3a-4$$