$2\sin\left(\frac{1}{2}x\right)+\sqrt{3}=0$

$4\left(x-1\right)-\left(4x-7\right)=2\left(3x-1\right)-31$

$1+\sin\left(a\right)-\cos^2\left(a\right)$

$\int\left(x^9\sqrt{x^5+10}\right)dx$

$\frac{x^2}{5}-2x+7$

$\int\left(5x+7\right)senxdx$

$\int\left(\frac{1}{\left(5-4x-x^2\right)^{\frac{5}{2}}}\right)dx$