$2\cdot\frac{\sqrt{2}}{2}$

$-7+-1+-6+-11+5+12$

$y'+xy=xy^{-2}$

$\arctan\left(0.6514\right)$

$\frac{\tan\left(x\right)+\cot\left(x\right)}{\sin\left(x\right)\cdot\sec\left(x\right)\csc\left(x\right)}$

$\int_{-\infty}^0\left(\frac{1}{1-x}\right)dx$

$\left(2x^2+7\right)^2$