$\frac{sen\left(x\right)^4-cos\left(x\right)^4}{1-2\cdot sin\left(x\right)^2}=1$

$-8\left(-7\right)-3$

$a\left(a-3\right)\left(a+1\right)_{\left(6\right)}$

$\int\left(3x^5+2x+1\right)dx$

$\frac{dy}{dx}=10-\frac{y}{4}$

$\frac{9}{25}a^2\frac{49}{36}b^2$

$\left(-1\right)-\left(-13\right)$