$3\cdot3^0+4^0\cdot4-5^0$

$4x^2+15x-17-2x^2+2x+4+13x^2-10x-9$

$\int e^x\:3^x\:dx$

$3x\cdot\left(x^2y-y^2x\right)-5\left(x^2y-y^2x\right)$

$\left(7ye^{7x}\right)\left(\frac{dy}{dx}\right)=7e^{3x}e^{8y}+3e^{8y}$

$\lim_{x\to0}\left(\frac{e^x-1}{sinx^{13}}\right)$

$\frac{3x^2-5x}{x-6}$