$x^2-26x+12$

$6t-t^2$

$\left(-0.3x^2+\frac{1}{3}y\:+\frac{5}{4}y^2\right)+\left(-\frac{1}{5}x^2\:+\frac{1}{2}y\:+\frac{7}{8}xy\right)$

$\frac{\left(1+sin\theta\:\:\right)^'\left(1-sin\theta\:\:\right)^'}{cot^2\theta\:}$

$\left(3x^4y^2+2x^3y^3\right)^3$

$\int\left(-3x^2\right)\left(\cos\left(2x\right)\right)dx$

$c^3-64$