$\frac{sin^2\left(x\right)+\left(cos\left(x\right)+1\right)^2}{\left(cos\left(x\right)+1\right)\cdot sin\left(x\right)}$

$\int xe^{\frac{1}{2}}dx$

$\frac{dy}{dx}=12x^3e^{-2y}$

$\tan^2\left(x\right)+3\sec\left(x\right)+3$

$3x^2y-2xy\left(3+2x\right)-4x^2y-3xy+2xy\left(-3x+1\right)$

$-5x+4\le-3x+8$

$\frac{cos\left(90\right)^2}{cos\left(90\right)^2+sin\left(270\right)^2}$