$\int\frac{10-x}{\left(x+5\right)^2}dx$

$\lim_{x\to infinity}\left(\frac{x^{.02}}{log\left(n\right)}\right)$

$3\tan\left(60^{\circ}\cot30^{\circ}\sin45^{\circ}\csc45^{\circ}\right)$

$\int\:\sqrt{9x^2+45}dx$

$1,2x^2y^{\frac{1}{2}}-x^2y-0,3x^2y$

$14x^2-10y^2$

$\frac{x^2+x-2}{x^3-x+3}$