What is expand 3/4 (1+s)(1-t)+5/4 (1+s)(1+t) ?

The solution to expand 3/4 (1+s)(1-t)+5/4 (1+s)(1+t) is (4s+t+st+4)/2

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expand 3/4 (1+s)(1-t)+5/4 (1+s)(1+t)

expand

\frac{3}{4} (1 + s) (1 - t) + \frac{5}{4} (1 + s) (1 + t)

\frac{4 s + t + s t + 4}{2}

Solution steps

\frac{3}{4} (1 + s) (1 - t) + \frac{5}{4} (1 + s) (1 + t)

Expand

\frac{3}{4} (1 + s) (1 - t) : \frac{3 - 3 t + 3 s - 3 s t}{4}

= \frac{3 - 3 t + 3 s - 3 s t}{4} + \frac{5}{4} (1 + s) (1 + t)

Expand

\frac{5}{4} (1 + s) (1 + t) : \frac{5 + 5 t + 5 s + 5 s t}{4}

= \frac{3 - 3 t + 3 s - 3 s t}{4} + \frac{5 + 5 t + 5 s + 5 s t}{4}

Join

\frac{3 - 3 t + 3 s - 3 s t}{4} + \frac{5 + 5 t + 5 s + 5 s t}{4} : \frac{4 s + t + s t + 4}{2}

= \frac{4 s + t + s t + 4}{2}

- \frac{x ( 2 x - 3 ) ( 2 x ^{2} + 3 x + 2 )}{2}

(3 x - 8 y - 18 = 0,) (3 x - 8 y + 1 = 0)

\frac{\partial}{\partial x} ((x - 1)^{2}) + (y + 2)^{2}

(- 2 + 6 i)^{4}

(1 - \frac{( x ^{2} )}{2}) \cdot (x - \frac{( x ^{3} )}{6})

What is expand 3/4 (1+s)(1-t)+5/4 (1+s)(1+t) ?
The solution to expand 3/4 (1+s)(1-t)+5/4 (1+s)(1+t) is (4s+t+st+4)/2