$m^2+10m+30=10$

$\frac{1-\cos^{2}\left(180^{\circ}-x\right)}{\cos x\cdot\sin\left(90^{\circ}-x\right)}$

$\lim\:_{x\to\:\infty\:}\left(\frac{\left(4x\right)cos\left(2x\right)-sen\left(2x\right)}{4\left(x^3\right)}\right)$

$2\left(3\right)^3-6\left(3\right)^2+3$

$\left(a^2+36\right)\left(a+6\right)$

$\cos\left(\pi+2\arctan\left(\frac{\sqrt{11}}{5}\right)\right)$

$\lim_{x\to\frac{\sqrt{24}}{5}}\left(\frac{\arcsin\left(x\right)-\arcsin\left(\frac{\sqrt{24}}{5}\right)}{x-\frac{\sqrt{24}}{5}}\right)$