$$\left(y+2\right)\cos\left(\left(y+1\right)x\right)$$

$$\int\cos2\cdot dx$$

$$\left(9x^2\right)\left(3x+1\right)$$

$$x\:-\:5\:+\:2x\:-\:3$$

$$25x^2=100x-118$$

$$y^3\sin\left(2x\right)-3y^2\left(\cos\left(x\right)\right)^2=0$$

$$-5x^2+27x-36$$