$5x+2+3x^{4}\cnte8x^{2}-27$

$\frac{\left(8a^6b^3c^4\right)}{\left(4a^3b^3c^4\right)}$

$d=x^2$

$\lim_{x\to-3}\left(\frac{x^3-4x+14}{x^2-x-12}\right)$

$\int\left(\frac{\left(1-cos2x\right)}{2}\right)^2dx$

$2x^2y+2xy^2+xyz$

$\int sin\left(7x\right)cos\left(5x\right)dx$