$x^2+20x+200$

$\frac{\sin\left(x\right)^2}{\cos\left(x\right)^2}+\frac{\cos\left(x\right)^2}{\sin\left(x\right)^2}$

$y'-3y=5$

$3\cdot\:\frac{1}{3}^2+4+4\cdot\:\frac{1}{4}^2+6$

$\frac{\cos\left(x\right)\left(1-\sin\left(x\right)\right)}{\cos\left(x^2\right)}=\frac{1-\sin\left(x\right)}{\cos\left(x\right)}$

$\sqrt[20]{x}\cdot\sqrt[20]{x^{2}}\cdot\sqrt[2]{x^{3}}\cdot\sqrt[20]{x^{4}}$

$13\cdot9.5$