$25-\left(-3\right)-2+\left(-7\right)$

$\sin\left(x\right)\cos\left(\cos\left(x\right)+\frac{\pi}{3}\right)+\cos\left(x\right)\sin\left(\sin\left(x\right)+\frac{\pi}{3}\right)=0$

$\int\left(3cosec2x\right)dx$

$\frac{5\left(5\right)}{5\left(5\right)-5\left(5\right)}$

$y+7y-8y=0$

$\int_e^{\sqrt{2}}3\left(x^{-2}+x^{-3}-x^{-4}\right)dx$

$121x^2-64c^2$