$\left(-7+5x\right)^2-3\left(-7+5x\right)+8$

$\left(2-\text{sen}\left(x\right)\right)\left(\cos\left(x\right)\right)\left(\tan\left(x\right)\right)=\cos2\left(x\right)$

$\left(-9\right)\left(+4\right)+15$

$\sin\tan\sec^2$

$\frac{dy}{dx}=\frac{1+xe^x}{y+e^{e+y}}$

$\ln\left(y\right)=\sin\left(x\right)+\ln\left(2\right)$

$\log_{15}\left(z\right)+\log_{15}\left(3\right)=1$