$\left(3\right)-2^3\left(2\right)-2^2\left(6\right)-2-11$

$\lim_{x\to0}\left(\frac{1}{2+te^{-2t}}\right)$

$\:\left(56\right)\left(53\right)\:$

$f\left(x\right)=-2x^4+5x^3-x$

$\left(\frac{1}{5}x^3-8mn^2\right)^2$

$\int\left(\csc\left(y\right)\right)dy$

$\int\frac{2-sin3x}{cos^23x}dx$