$\frac{nx^n}{2^n}$

$100+4$

$8.\:\left(-7\right)-15$

$\int_1^x\left(sen^3\left(t\right)\right)dt$

$7p+6q-2p+q$

$\left(3\right)^2.3^2.\left(-3\right)^3.3^0$

$\pi\int_0^{\frac{\pi}{4}}\left(\left(7cos\left(x\right)+1\right)^2-\left(7sin\left(x\right)+1\right)^2\right)dx$