$4\frac{d^2}{dx^2}\left(y\right)+64y=cos\left(5x\right)$

$+c+9c-5c$

$h^2-30ht+h$

$\sqrt{100x^5y^{11}}$

$\frac{sin\left(x\right)}{cos\left(x\right)}.\left(\frac{sin\left(x\right)}{cos\left(x\right)}\right)$

$\frac{dy}{dx}\left(x^{4^x}\right)$

$\left(2x^3+\left(\frac{1}{3x}\right)\right)\cdot\left(x^5+4\right)$