S i m p l i f y 5 - 1 × 7 2 5 2 × 7 - 4 7 / 2 × 5 - 2 × 7 3 5 3 × 7 - 5 - 5 / 2

Hi, We know that axay=ax-y and ax×ay=ax+y so here 5-1×7252×7-472×5-2×7353×7-5-52=5-1-2×72+472×5-2-3×73+5-52=5-3×72×76×72×5-5×-52×78×-52=5-212+252×721-20= 542×7 = 52×7 = 175 

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5-3 x 5 x 1by 7
 
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