$\lim\:_{x\to\:-\infty\:}\left(\frac{4x^2-1}{2x^2-7x+2}\right)$

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

$-5.9\:+\:9.3$

$\left(2x^2-5y\right)^4$

$\frac{2z^2}{3y}x\frac{5z}{7}$

$\int\left(2x+7\right)\left(x^{2\:}+7x+2\right)^8dx$

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