$cos\:\infty\:\left(sec\:\infty-cos\:\infty\right)=sen^2\infty$

$24m-36c$

$x^3-2x^2+5x=0$

$\int\left(\frac{x}{\left(x^2-6\right)^{\frac{3}{2}}}\right)dx$

$\int_7^8\left(\frac{x}{x^2+4x+13}\right)dx$

$\left(-n+m\right)\left(6m-5\right)$

$cos\:y\:-x\cdot\:\:sen\:y\:\frac{dy}{dx}=0$