$cosx^6\cdot sen^2x$

$\frac{dy}{dx}-\frac{y}{x}=\:2\:ln\:x$

$\left(\frac{n^4+2n^3+n^2}{4}\right)\left(\frac{16}{n^2}\right)$

$\frac{x^4-8x^3-19x^1-16x+4}{x-2}$

$21.04+0.211+126.14$

$\left(a+b\right)-\left(c-d\right);a=2;b=1;c=\frac{1}{4};d=\frac{1}{2}$

$1.67+\left(-0.571\right)$