$x^2+9x-12+\left(-2x+3\right)\left(x+1\right)=0$

$e^{-\infty+2}$

$\int\sin^3\left(6x\right)\cos^2\left(6x\right)dx$

$\int4^{3x}dx$

$\frac{50}{\left(cos\:87^{\circ}+cos\:84.2^{\circ}\right)}$

$\left(-\frac{7}{5}\right)^{5\:}:\left(-\frac{7}{5}\right)^{-3}.\left[\left(-\frac{7}{5}\right)^2\right]^{-3}$

$4x^2-20x$