$x^{3\sqrt{5}}\cdot x^{4\sqrt{5}}$

$\left(7+3i\right)\left(-7+5i\right)\left(-8-4i\right)$

$\int\frac{x^3}{\left(7-x^4\right)^7}dx$

$\left(-8x+2y\right)\left(8+2y\right)$

$\int_0^1x\cdot\sqrt{1+\left(\frac{1}{2\sqrt{x}}\right)^2}dx$

$\log x+\log\left(x-3\right)=2\log\left(2\right)$

$e^{x^2}dy=-xy^3dx$