$+3\left(x^4+y^2\right)$

$\int\:\sqrt{1+\left(e^x\right)^2}dx$

$\ \left(2a^4b^2\right)^2=4a^8b^4$

$\left(4ax^2+7y^0z\right)+\left(4ax^2-7y^2z\right)$

$\int\frac{1}{x\left(x-5\right)^{\frac{1}{2}}}dx$

$\log9=7-\log2$

$x\left(y^2+1\right)dx+\left(2y+1\right)e^{-x}dy=0$