$\left(x+y\right)^2+2\left(x+y\right)\left(a+x\right)+\left(a+x\right)^2$

$2x\cos\left(2x\right)-\left(x-2\right)^2$

$4\sin\left(x+0.08\right)+8=5$

$\int_1^{\sqrt{x}}x\cdot2^{-2x^2}dx$

$2x+4\:para\:x=-2$

$\int_1^3\left(e^2x\right)dx$