$+2x^2-11x-5=0$

$\int\left(\frac{x^2-4x+4}{\left(77+4x-x^2\right)^{\frac{3}{2}}}\right)dx$

$-9x^3y-6x^4y$

$-27x^9y^2+9x^3y^4$

$\lim_{x\to w}\left(\frac{cos\left(xt\right)-cos\left(wt\right)}{w^2-x^2}\right)$

$\cos^2\left(x\right)-\frac{3\cos\left(x\right)}{2}=1$

$\int\left(x^7cos\left(x^8\right)\right)dx$