$1+\frac{dy}{dx}=y$

$5x^2+3x+2x$

$2\left(\frac{1}{2}a^2\right)\left(-\:2b^3\right)$

$\frac{\sec\left(z\right)}{\cos\left(z\right)}$

$\int t\:sen^2\left(2t\right)dt$

$\left(\frac{6^2}{4}+2\right)-\left(6^2-5^2\right)$

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