$\frac{dy}{dx}+ycos\left(x\right)=e^{-sin\left(x\right)}$

$\frac{\left(3+4i\right)\cdot\:\left(\frac{3}{2}\sqrt[3]{-64}-2i\right)}{\left(2\frac{2}{5}-4i\right)\cdot\:\frac{5}{2}}$

$348\cdot1.4-18\cdot1.4$

$\frac{4-10w}{-4}$

$-83.68+11.21$

$\frac{1}{x^{-9}}$

$2sin^2x=cos\:2x$