$\frac{xydy}{dx}=1+y^2$

$\int\left(1+2\:x\right)^4\left(2\right)dx$

$\left(abc-1\right)\left(ab+1\right)$

$\frac{3e^{2x}}{5x^{-2}}$

$3a-15$

$\frac{\sec^2\left(x\right)-1\:+\left(\sec\left(x\right)-\cos\left(x\right)\right)\sec\left(x\right)}{\sec\left(x\right)\tan\left(x\right)}=0$

$\left(\frac{1}{2}ab+\frac{3}{4}c^2\right)^2$