$\frac{\sec\left(m\right)\cos\left(m\right)}{\cot\left(m\right)}=\tan\left(x\right)$

$-151-61$

$-5g-\left(8-g\right)=12$

$3\cdot\cos^2\left(x\right)-2\cdot\cos\left(x\right)-5=0$

$\left(9a^{10}+30a^6c+25a^2c^2\right)$

$\frac{81x^{6}7y^{4}12x^{2}}{9x^{2}4y^{3}6x^{2}}$

$\frac{d}{dx}\sqrt{\frac{\sin x+1}{1-\sin x}}$