$\frac{\left(-1\right)^n\cdot n}{2^{2n-1}}\cdot\left(x+3\right)^n$

$\lim_{x\to e}\left(x-e\right)^{-1}$

$\int_0^{\frac{\pi}{2}}\sqrt{1+tanx^2}dx$

$\int\left(-cos\left(y+1\right)\right)dy$

$56xy^2-45xy^2+45xy-65xy$

$\left(2a\:-\:b\right)\left(2a\:+\:2b\right)$

$95 ^ { 2 } + 235 ^ { 6 } + 194$