$\left(4x^43\cdot x^4\right)^3$

$\int_0^x\left(\frac{\sin\left(a\right)}{x+1}\right)da$

$6\cos\left(x\right)^2-5\cos\left(x\right)+1$

$\frac{x^3-x}{4x^2-21}$

$7-\left[\frac{\left(-9\right)}{\left(-4+1\right)}\cdot3+9\right]\cdot\left(-4\right)+10$

$\int3x^2\left(x^3+7\right)dx$