$2x=2$

$\left(10x^{10}+5\right)^2$

$100a^2-60a^2b+ab^2$

$5+19\cdot2$

$a^2\cdot b^3\sqrt[3]{a^8\cdot b^7}\cdot ab$

$\frac{\cos\left(-a\right)}{\sec\left(-a\right)+\tan\left(-a\right)}=1+\sin\left(a\right)$

$\frac{d^2}{dx^2}\left(3\cdot\csc\left(3x\right)\cot\left(3x\right)\right)$