$\int\left(12x^2sqrt\left(1+4x^3\right)\right)dx$

$\int\frac{x^4-7x^2+4}{x^3-4x}dx$

$-\frac{2\left(x^2y\right)^{-2}}{-5x^{-1}y}$

$4\left(v-3\right)+10\left(4v+7\right)$

$\sin\left(80\right)\cos\left(35\right)-\cos\left(80\right)\sin\left(35\right)$

$+4n^3+5n^3-n^3$

$3\left(10+2b\right)=24$